Author's Note: First chapter of my huge crossover story. I hope you'll all like it. Please read and review.

Disclaimer: I don't own the fantastic movies.

Travelling Through Dimensions

Chapter One

Saturday, April 2, 1988
11:47 A.M.
Hill Valley, California

Martin Seamus McFly sighed deeply, as he skateboarded up to the Brown driveway, and stopped to a quick halt right in front of the door. He stepped off, and picked up the skateboard. However he was nineteen, two months shy of turning twenty, he still loved to ride his old board. He'd easily gotten used to the fact that he had a truck now, especially after his memories caught up to him, but the skateboard still continued to have it's charm.

The musician looked up at the house, which was standing in the middle of huge fields, and made a beautiful picture, when you thought of it. It was lonely, standing about a quarter mile away from the nearest other house, and big enough to have place for a family and eventual visitors. Marty realized that his friend could've made far worse choices in selecting a new home for his family to live in.

The teen smiled, as he thought back to October of 1985, in which Doc had unveiled his time machine to him and taken the teen on various adventures in past, future and even farther past, which eventually had made Marty end up with improved parents and siblings, and Doc with a wife who used to be an Old West school teacher and two children aged eight and six, who hadn't even been around the day before.

Marty had barely had a chance to settle down in his new life when Doc appeared again. November twelfth, 1985, was a major day for both of them, and the teen realized that he would've been disappointed had his friend not showed up. Anyway, Doc had there celebrated the thirty-year-anniversary of Marty's successful return to the future, as well as their successful stopping of Biff's evil plans by burning the almanac. Also, the inventor had given Marty information about when he would return to the future.

Doc had told Marty how he'd first considered staying in the past, then he'd thought about returning to 1994. Apparently, Doc was currently residing in December of 1894 – and figured that it would only be fitting that he should return nine years later, as Jules and Verne were already older than they should be, if they were born in 1986 and 1988. Luckily, Doc had talked himself out of that – and the inventor had changed things in the past, by adding birth certificates and providing himself a nice new history for his family.

Marty smiled, as he reflected on the new series of events. Doc and Clara had first met on September fourth, 1976. Clara had, at the time, been in New Jersey, and she was studying as a school teacher. Doc therefore had decided to let her stay there, and, to give her some support, they'd married soon, on November twelfth of the year. On September twenty-fifth, 1977, Jules had come to the world – and on October twenty-ninth, 1979, Verne had followed his older sibling. Clara had finished her education in 1982, but there had been drastical problems in getting her to Hill Valley. In that fateful October weekend, the inventor had finally left to make things right – and now, they were moving back within months.

It was kind of a sloppy idea, of course, but it worked quite a bit. The inventor actually got away with it, being considered a weird guy in town by some people already. And even the others, that didn't think he was crazy, at least knew he was a bit eccentric. So, they had accepted the idea without problems, and in January 1986, Emmett Brown had settled in 1986, after having spent ten years in the past.

The teenager then sighed again, and wondered what his friend was going to have him do this time. The inventor always had weird ideas on how-to-ruin-Marty's-free-Saturday, starting with that very first time travel experience and continuing throughout '86 and '87. Probably it wasn't really done on purpose, but still, it wasn't a fun weekend. Marty wondered if he could ever get a chance of studying, today. His focus was on music, but he wanted to have his second year of being in college turn out fine and therefore, he had to put a lot of free time into his work.

Marty grabbed his key out of his pocket, and opened the door, not caring to ring the bell – he had the key anyway, and for all he knew, Clara was busy with something and didn't have time to open the door. Jules and Verne maybe could open the door, but for all he knew, they were busy playing and would be more than a little annoyed at having their game be disrupted. And Martin…

The musician still blushed at the honour of having Doc's third kid named after him, even now it was seventeen months ago the boy was born. Martin Socrates Brown had joined the Brown family on November twelfth, 1986, at 10:04 PM – Doc had talked about the amazing coincidence for weeks at the time. Marty wondered what the boy was going to turn out. An inventor, like his father – and, from what he'd learned from Jules' personality, his brother? A musician, like his namesake? The teen grinned a bit at the possibility of one of Doc's kids being a musician. What about a teacher? Like his mother, Clara?

The teenager shook his head. He was thinking about the future far too much. He had to focus on the present, on the here and now – 1988. He shouldn't just let his mind go off to the nineties and early years of the twenty-first century. Having access to a time machine (when Doc would give him permission, at least) sure did weird things to a person.

Still, Marty couldn't help but think. What would he be, in about twenty or thirty years? A world famous rock star? A poor loser like his older self that Jennifer saw three years ago… or twenty-seven years ahead. What would his son turn out to be? Marty Junior wasn't all that confident the last time Marty saw his son. Maybe the boy would turn out like his grandfather, despite everything the musician did – would do – to help his son grow up right and defend himself against bullies like Griff Tannen. Or maybe the teen would still turn out to be like his father, confident but a bit too much, and having a terrible temper that would ruin his life. Or maybe he was something in-between…

"Marty?"

The teen looked up, as he saw Verne entering the hallway from the other side. The now eight-year-old was wearing a futuristic cap, that looked even more out-of-the-eighties than the one he'd had to wear on that trip to 2015. As Marty looked closely, he could even see '2027' on it. Under that, Verne was wearing old 1880s pants, and a shirt that resembled the ones Marty wore on his visit… visits to 1955. He grinned, as he looked at the weird combination of future, past and even farther past. It was like Verne dressed just for all the periods Marty had visited. Another sign that says today will bring something big time travel-related, the teen thought. Or is my imagination going to weird places and is this just showing how accustomed to other time periods the Browns really are?

Verne stepped forwards, distracting Marty from his thoughts. "Hi, Marty" he said, smiling. "What are you doing here? Are you coming to teach me how to skateboard?" Verne had been wanting that for months, after seeing how many cool tricks Marty did on his board, both the skate- and hover-variation, last of which was safely stored in the back of the Brown's house. Ever since Christmas '87, when Verne got his own skateboard, he'd been begging Marty to teach him how to ride it every time the teenager visited.

The nineteen-year-old chuckled, and shook his head. "Nope" he told Verne. "I'm actually coming here for your Dad. He told me he had another one of his experiments planned, and I have to admit, I'm kind of curious what it is." He smiled. "I just hope he won't blow me up this time."

Verne snorted. "Like he ever did that" the boy said. "But you're right – there are some of Dad's experiments that I am a little nervous of getting too close to. Jules isn't, though – he says I'm a chicken and that everything is perfectly fine, and he continues saying that, even if something happens. I bet he'd still be saying that if the lab exploded." The boy snorted again, this time in disgust. "But I'm not chicken, I'm just being realistic!"

Marty winced a bit, remembering how much trouble his own problems with the word 'chicken' had caused him. "You're right" the teenager admitted. "I'm not always as happy to go into the lab, either. But if Doc says it's safe, I trust him. He has been my friend for over twelve years, after all. Almost 12 ½, actually." The musician peeked besides Verne's shoulder. "But now I've gotta go. Where's your Dad?" He peeked once again. "In the lab, I assume?"

Verne nodded. "Yeah, he's in the lab. I dunno what he's working on, though. Jules knows, but he won't tell me." The slight look of disgust is back. "Anyway, I better go. Mom said I have to help getting dinner ready for this afternoon." He sighed. "Marty, did your mother ever force you to help with dinner?"

"Not always" Marty said, thinking back of both the timelines he'd lived in. "But she did, sometimes. Your mother doesn't have always time – or energy – to do things. So, you should try to help her, if you can."

"Yeah, right" Verne said, not entirely convinced. "Well, in that case, I better get going, then. Mom would be mad at me anyway, if I refuse to help. Well, I suppose I'll see you around – perhaps even sometime later today." He smirked a bit. "See you in the future, Marty."

"See you" Marty said, laughing, as Verne walked off to the kitchen. The musician then took a deep breath, and headed over to the Brown laboratory at the back of the mansion.

As Marty approached the lab, he once more thought about what Doc could want him to do. The inventor hadn't asked Marty for something like this for a few weeks, having been busy with a project. Was this that project? Also, would it involve the teenager getting trapped in the past for a long time… again? The teen shivered as he thought of that first weekend. It hadn't been all bad, but fun wasn't the appropriate description either. It had been quite hard, first getting his parents together, getting back home by catching a bright bolt of lightning, then getting Griff into jail – however that hadn't been the purpose, not really – getting that almanac away from Biff, saving Doc in the Old West from Buford 'Mad Dog' Tannen, and finally, returning home to 1985 in the DeLorean which was pushed along by a steam locomotive heading straight for a ravine with Doc and Clara hover boarding away from it, and, to Marty's knowledge, hovering into a life stranded a hundred years in the past. Then, the train had destroyed the DeLorean, and Doc had shown up from the past, and all kinds of weird things had continued to happen… he'd been happier than he'd ever been when that mind-wrecking weekend finally came to an end.

Marty sighed deeply, as he knocked on the door of the lab. "Doc?" he asked, wondering if the voice-identification computer was turned on. "It's me. Marty. I'm here to do.. whatever you asked me for." The teenager waited a few seconds, wondering what would happen, and then the door opened automatically and Marty walked forwards, entering the Brown lab.

What he saw was what others would describe as the work of a madman. Inventions, finished and unfinished, lying around everywhere, a huge steam train, a DeLorean filled with all kind of weird gadgets, some of them from ahead of this time. And in the centre of it all another huge thing with some blanket over it, and next to it was sitting a proud and happy but madly looking Doctor Emmett Lathrop Brown.

"Hi, Marty!" Doc exclaimed, as he saw Marty appear around the corner. He quickly ran over to the teenager and pulled him along. "I'm sorry I didn't come over to the door to great you immediately, but I was just checking my calculations for my new invention. I figured it would work, but I really was up late last night to check it – up until two AM – so I wanted to make sure that my blueprints were fine."

Marty gulped a bit at the mention of the 'new invention'. "Is that what you've been working on for the past few weeks?" he asked, a bit nervous.

"Affirmative" Doc said. "Months, actually. I started this project shortly after Martin's first birthday, when the 'kids birthday season' had come to an end and I could concentrate on my inventions again." Doc's children were born in order to month: Jules September, Verne October and Martin November. Doc often called it the kids birthday season, and around now, almost everyone in the house, including Marty and Jennifer, called that time of year that way. Of course, Jennifer also had her birthday there somewhere, on September seventeenth. Doc, Marty and Clara were born in the earlier half of the year – in March, May and June, respectively.

Marty walked up to the huge thing, which continued to be covered under a blanket – quite annoying, the teen figured, as he was getting more curious with the second. "Is that, um, the invention?" he asked. "Is that what you're going to test?" He walked around it, inspecting every little part. It was a little smaller than the train, so that couldn't be it – there was also the fact that the train was already stored somewhere else, as Marty could see, but when you had a time machine, you could easily store two versions of the same machine somewhere, as long as you made sure the past version would eventually become the older machine. Would his kids have come to visit in a future time machine? No, then Doc wouldn't have talked about a new 'invention', and then they wouldn't have come in whatever – they would've come in the DeLorean instead. Or would the future DeLorean not exist anymore? Now, he shouldn't jump into conclusions… But still, he wondered. What would this be…

"You're curious, right?"

Marty looked up at Doc, who was grinning, and blushed. "Yeah, I suppose I kind of am" he admitted. "I just – I just can't figure out what this is. It's not the train, it's not the DeLorean – it's not the size of any of them. So, Doc, I know you like keeping things a secret, so why don't you reveal to me what you made?" He blushed again, then looked at the machine in anxiety. "I don't know how long I'm going to last waiting like this, Doc…"

"You won't have to" Doc said, smiling as comfortingly as he could. He then walked over to the blanket, and in one soft pull, he managed to get most of it off, and got the rest of it off the machine before he joined Marty, whose jaw had dropped. "May I present to you, Doctor Emmett Brown's time travelling bus!" He chuckled a bit, as Marty just gasped at the whole thing.

The bus was grey-coloured – probably to have it not be discovered – and glowed like it had just gotten it's paint job. As Marty looked past the sides of the bus, he saw many seats were there, providing room for many time travellers, even more than the train could contain – well, in seats anyway. The bus looked pretty simple, and very much like a real one, except for the familiar 'ELB' logo on the sides, and a standard Mr. Fusion unit on top. Marty noticed some sort of barrel going from down below to the unit – he wondered what it was for. Underneath Marty noticed a faint shadow of what appeared to be another standard 2010s hover conversion unit. Of course, the musician thought. If cars can fly, why can't busses?

"Surprised?" Doc asked, smiling.

"Hell, yeah" Marty nodded. "An actual bus as time machine – well, I suppose it's no weirder than a train, or even a car, but it's still – weird, you know." He turned to the inventor. "This is what you've been working on all the time? And now, we've got to test it for it's first temporal journey?"

Doc smiled again, this time at Marty's usage of words that, well, he was more likely to use. "Not really" he admitted. "I already did that this afternoon. No, we're going to test a whole other part of the new time machine. Something that I haven't installed in the DeLorean or the time train yet, and that might prove to be dangerous enough to just keep it in this one machine. In fact, that's almost the sole purpose I created this bus time machine for." He turned to Marty. "I do have a manual, though, that will tell Clara exactly what to do, if something was to go wrong and after a day, we're still missing, so she can install the necessary components in either the train or the DeLorean and come after us. . After all, we can theoretically come back at the minute after we left, so just two minutes would be able to tell her things are 'wrong'. Yet, I don't want Clara to make hasty decisions. For all we know, the adventure we'll experience will set our internal clocks out of synch in a way that makes us forget the exact time we came from, or gives us a feeling we don't want to return to that time, as we're too tired."

"Yeah, right" Marty said, half of the speech going over his head. "So, what is this dangerous thing you just installed?"

Doc smiled mysteriously. "Follow me" he told the teenager, and went inside the bus, using the door in the front. Marty hesitated a moment, then also followed his friend inside, wondering what he'd see. He knew he could trust Doc, most of the time, but what if his friend had been underestimating the risks of… whatever this new invention was?

The teenager gasped at what he saw, as he entered the bus. Inside, it didn't look too much like a normal bus. There were weird lights and things where they shouldn't be – and next to the wheel was the 'usual' set of displays: the time circuits, and the spacial displacement circuits. The latter were built in order to have the time machine be able to travel through space as well as through time, and they were installed in the DeLorean and the train in February of last year. Marty winced, as he remembered how they had caused them some problems on time travel trips – to 68 AD Rome, for example. That hadn't been fun – he could see the lions wanting to eat him right now, even thought the event happened so long ago – time period wise and present-day-wise. He decided to just ignore that thought and continue looking around, and found a third set of displays: they weren't clearly marked, and just had one rectangle per time, making it a total of three rectangles. Every rectangle had four little squares in it, and Marty seriously wondered what they were for. Would this be the new amazing but dangerous thing that Doc had installed in the bus?

"This is my bus" Doc said, as a matter of fact. He then turned to the front, facing Marty. "Take a seat, and put your seatbelt on. In the air, we're not as likely to get hit as on the ground, but I don't want our lives to end because of a passing airplane."

"Right" Marty muttered, sitting down on the seat to the right and putting on his belt. After he did that, he looked up, and noticed Doc was just doing the same thing. After finishing, Doc stared at Marty, then at the front. "Time circuits on" he ordered. "Spacial displacement circuits on. Dimensional displacement circuits on."

Before Marty had time to wonder what the last thing meant, all three of the readouts came to life, glowing up in the dark of the hidden room the time machines were stored in. Marty faintly noticed the present time being 11:58 before concentrating on the other circuits, the new ones. Both the upper and lower readout were dark 8's, but the centre one glowed in a bright green 'PF 50'. "Um, Doc?" Marty asked, figuring this was as good of a time as any to get the big question out. "What's that?"

The inventor looked over to where his friend was sitting, and smiled. "Ah" he said. "I see you've noticed the displacement circuits. 'That', Marty, as you call it, are the circuits lining up in connection to the DFSCUPCIF unit."

"The what?" Marty repeated.

Doc smiled. "DFSCUPCIF. Short for Dimensional Flux Storage Capacitor Unit as well as Purposely Creator of an Interdimensional Field." He grinned. "I just thought DFSCUPCIF was shorter, but it remains a mouthful since you can't speak it as one word." He pointed to the back. "That's it."

Marty looked, and for the first time realized that the flux capacitor was not quite the flux capacitor anymore. Not in this version, anyway. The thing was the flux capacitor, upside-down as in the drawing Doc had made when conceiving the thing on November fifth, 1955, for the first time, with another flux capacitor attached to it. The other capacitor was above the first one, and was the right way up and down, which made that both of the straight tubes hit each other. Shortly said, it was just an 'X', only there was an extra stick between both of the halves of the X, making it really look weird. The teenager gasped at it, and wondered why Doc had put two flux capacitor's to each other, and why he'd even built two in the first place.

"What do you think?" the inventor asked, semi-responding to Marty's silence.

"Um, it looks great – I think" the teenager said, smiling nervously. "But why did you make two flux capacitor's? Won't one be enough for a time trip in one machine? Or has this something to do with that interdimensional thingy you were talking about?" He felt a bit confused about the whole thing. Maybe I should've just stayed at home… then again, I'm starting to get more curious with the moment.

"Exactly" Doc confirmed. "Have you ever heard about that story? About how when you chose to go left on a crossing, it wasn't the only choice for you to make? That you also could have gone forwards, to the right, or just turned around to go home? And how about for each decision you could've made, there are other worlds to go with that one? Entirely different space-time continuums?" He snorted. "Granted, that last solution is rather improbable, but it's possible."

"Um… no, I haven't heard of it" Marty admitted.

"It is a common theory" Doc told his friend. "It's pretty well-known. Granted, I don't entirely believe in it, as that would mean there would be universes for every little thing that every single citizen on earth does or doesn't do, but I assume that it's possible for other dimensions to exist. And just yesterday evening, I finally finished, after hard work, an invention that should make it possible for us to access those dimensions and find out what happened to us there. And that's the DFSCUPCIF." He pointed at the machine once again. "As you have seen, it consists of a double-flux capacitor. Therefore, it also needs double as much energy: a full 2.42 gigawatt. Which is easily to come by because of the enlarged Mr. Fusion generator on top of the bus." He smiled. "The funny thing is, with the DFSCUPCIF, you can both travel through dimensions, travel through time, and travel through both – it all costs equally much energy. Luckily the Fusion generator provides a clean energy providing, so it isn't that bad that time travel costs now double as much energy, as in the DeLorean and in the train – as well as the old DeLorean, from that very first time travelling weekend, which we used to travel to 1955, 2015, Biff's world, 1955 again, and 1885. Actually, only you went on the first trip, but that is not of the matter right now."

"Wait a minute" Marty said, starting to understand pieces of it now. "Are you telling me we can travel to other worlds, where you and I don't exist? Or where we do exist, but some things didn't happen to us?" He smiled. "That seems pretty cool, actually. As long as I'm not too bad off there, I'd be willing to try."

"I can't guarantee you anything, as I haven't tried it yet" Doc admitted. "But we can at least attempt to try to find things out before actually meeting our other selves, so we can leave right away if we see something that isn't quite right with us, for whichever reason that might be."

"You're the Doc, Doc" Marty said, smiling a bit.

"Exactly" Doc nodded. He then turned to the front. "All right, send out message: OCR!" The machine then did so, and Marty watched as the roof of the cellar opened, as Doc instructed. "Flying circuits on" the inventor then told the machine, and the bus lifted up. The scientist then took control, and lifted the bus vertically up from the cellar, and stopped when it was hovering about five feet above the roof of the Brown's house. "CCR" Doc then instructed, and the roof closed again. The seventy-seven(perhaps seventy-eight)-year-old then took off, and the bus started to fly towards the Eastwood Ravine.

Marty then looked down. "Doc?" he asked. "Where are you going?"

"I'm just looking for a nice place to depart from" Doc told his friend. "Eastwood Ravine should be a good place. For all we know, we'll end up in a universe in which something prevented me, or later you, from going back to 1885. We'd know something like that would be the situation if the ravine is called Clayton or Shonash Ravine." He shivered at the thought of his beloved Clara actually falling into the ravine. That thought was even more terrible than him getting shot at Buford Tannen's hand in the Old West.

"Good point" Marty said, figuring he wouldn't have thought of that himself. "What about Lone Pine Mall? That one's pretty inconsistent in the timelines, too. Or Courthouse Square…." This time it was his turn to shiver, thinking of how the Square had looked like in the Biff-horrific world. "That way, when we do end up in Hell Valley, we'll know it and we can depart right away."

"All are good possibilities" Doc admitted. "But right now, I'm going to keep things to Eastwood Ravine. We can try out one of the other possibilities at a later time." He turned to Marty. "This might be pretty fast for you, but… are you ready, yet?"

"I dunno" Marty said, shrugging a bit, feeling nervous. "What if we do end up in that terrible Biff-ruled world… again? Last time, Biff tried to come after me with a gun. This time, he won't hesitate shooting me, I'm sure."

"We'll stay in the bus until we are sure this reality is safe" Doc assured his friend. "I was committed in that world, and I'm not so sure that Biff would hesitate to shoot me if he found out I escaped. Granted, he knows you better, you being his stepson… yes, Marty, I know it's a disgusting thought… but I don't think he would think of me kindly, either. The fact that I wasn't committed in our timeline or in any other timeline we've visited, yet, makes me believe that my commitment was, if not entirely, mostly due Biff's hand."

"Which makes me hate that version of Biff even more, if possible" Marty said, with disgust more clearly than ever in his voice.

Doc winced. He could sympathise – however he hadn't seen his father lying dead in a grave, which, to him, had already happened over thirty years ago – he had seen himself in a straitjacket, getting sent off to the nearest mental institute. The look on his other self's face still haunted him after those three years… or was it twelve? Or thirteen? Anyway, he was sure he was never going to forget Biff-horrific Hell Valley, even if he hadn't been there for more than almost six hours… maybe almost seven, if the DeLorean had made the jump from Pacific Daylight Time to Pacific Standard Time well. He'd never checked, being too busy with everything going on, and maybe it didn't even work, due to the glitch that already seemed to be in the time circuits and later expressed itself fully when the inventor got sent back to January 1st, 1885, at midnight, the very first second of the new year… or was it the old year?

Anyway, and adding fresh new memories to that collection of memories about Biff's world was not going to help forgetting. Doc shivered a bit, as he realized how right Marty might as well be.

"So?" Marty asked, in an instant making Doc return to reality – it was 1988 now, not 1985-A or 1955 or even 1885. "What are we going to do? Are you just going to depart when we find out we've arrived in that Biff-horrific reality?" He shivered a bit, again. "What if something's wrong with the system and we can't depart in time?"

"Everything should be all right" Doc said. "Exposal to pollution, even so much as Biff had be around, can't do many things to the time circuits or DFSCUPCIF in the short time we'd be there, and the normal systems work fine."

"Are you sure?" Marty asked. "You've said that before…"

"Absolutely certain" Doc said. "But if you want, I can run an extra test." He turned to the time circuits computer. "Test internal functions. Sections: All. Style of process: Carefully." He leaned back. "Should be ready in about one and a half minute. It's a hyper-modern system from 2029 – that won't miss even the slightest error." He smiled. "It's going to be fine, Marty, it really is. We are going to be all right, so you can stop shivering from terror. Heck, I've never seen you this nervous on any time travel trip – not even the very first ones!"

Marty smiled faintly. "That was only time travel" he said. "In the future, we'd have technology, and in the past, we could just write a letter to Clara and wait out the time 'till she got here with the train or the DeLorean, depending on which vehicle we did not travel in. This is dimensional travel. We won't reach the present due the natural course of time if something was to go wrong, since this is going to be the present – and a drastically alternate version of it." He looked at Doc in a hint of fear. "For all we know, we might even get sick in another dimension. Who can tell?"

"Who can tell" Marty muttered. "I can't, at least." He looked down the ravine. "So, are we going to leave, now? I mean, if you're so secure that everything is gonna be fine and all, then we can just leave and arrive in the first world we are going to encounter?" He smiled faintly, then winced a bit as his own words 'first world' sank in deep. "How many worlds are we going to visit, anyway?"

"Not that many" the inventor assured him. "Just a few, to check out what other worlds are like. I think two or three would be enough. We don't want to overload the system, or encounter things we really don't want to see, and keep hopping. Not that there would be any problems with the system" Doc assured Marty, who was starting to get his 'fear look' on his face again, "nor with the dimensions we travel through. Most likely, everything is going to be fine. I'd estimate an ninety-nine point four percent."

"Ninety-nine point four" Marty muttered. "Really relaxing." He turned to the system. "How far is that thing done, anyway? You said it would take about a minute and thirty seconds… hasn't that time passed, yet? Shouldn't that machine be done already?"

As if to illustrate his point, the machine went off with a semi-pleasant beep. "Systems fully functioning, Doctor Brown" the machine told. "No errors found. You can safely commence your travels. Have a nice day, Doctor Brown." Marty smirked a bit at the last part.

"Really efficient, those computers from 2029" Doc said. He turned to Marty. "Now, are you about ready to go, yet?"

"Yeah" Marty nodded. "It seems kind of cool and all, and if you're sure that there aren't any problems, we can just stop hanging around here doing nothing, and leave this world."

"My thoughts exactly" Doc said. He turned to the time circuits display. "Let's see, it's 12:11 now, four minutes ought to do it. We can just move the Destination Dimension one number forwards, at the first test – a positive addition, the current number plus one, might have positive outcomes on the test. Not that I entirely believe in that possibility, but who knows…" He smirked a bit. "That ought to do it. Destination: April 2, 1988, 12:15 P.M., Eastwood Ravine, Hill Valley, California, PF 51."

Marty watched as, in rapid succession, the numbers and letters filled the 'Destination' part of the screen, lighting up in a soft glowing red. The teenager noticed that now only the lower (yellow) display of the dimension circuits was empty, and that would probably change the instant they'd arrive in the new reality. He tried to breathe as less nervous as he could, wondering if he had been right and something would indeed go wrong. He pretty much trusted Doc, but the inventor's ideas weren't fool-proof either, and when it concerned other dimensions, worlds not their own…

"Ready?" Doc then asked, distracting Marty from his thoughts. The inventor had unbuckled himself from the belt, as he often did when time travelling, in order to be able to keep a tight grip on things and run around to check. Now, the inventor just smiled. "Are you about ready to access the new dimension?" he repeated, wondering if Marty, who was apparently distracted, had gotten the message. He didn't want his friend to be ill-prepared, instead fully alert when the dimensional barrier was to be broken.

"Um, yeah, right" the teenager nodded, nervously. What to expect, what to expect…

"We'll be fine" Doc said, patting his friend on the back. "We'll be okay." He smiled at Marty, then turned back to the bus. He then sat down, and pressed the gas pedal. Marty watched in excitement, as the bus rose up above Eastwood Ravine, and started moving through the sky above it at thirty-five miles per hour and rapidly accelerating up to the ever-consistent eighty-eight.

"Doc?" Marty then asked, as the speedometer just hit fifty. The inventor let the bus move forwards at a steady fifty-two and turned to his friend, who added: "Just how shaky is dimensional travel? I mean, time travel doesn't shake the car that much, but maybe dimensional time travel is different."

"That is a possibility" Doc said. "But, honestly, I wouldn't know. If you have forgotten, this is my first trip through the fifth dimension, as well." He smiled, and resumed the accelerating, flying the bus up higher and higher through the sky.

Marty just had time to realize that maybe he should've turned around, as the bus hit seventy and the place they were up was about fifty feet from the ground, adding another thirty feet for the ravine that continued to be under them. He gulped, and turned to Doc, who had his eyes focused on the speedometer. "Seventy-five" the inventor counted. "Eighty, eighty-five, eighty-six, eighty-seven, eighty-eight miles per hour!"

The DFSCUPCIF fluxed more than it's counterpart in the other time machines had ever done. Just as the time machine was about to pass over the Eastwood Ravine Bridge, the bus broke the dimensional barrier with an o-so-familiar flash of intense white light and triple sonic booms. And within seconds, the Trilogy Universe was left behind.