My theory is about moments, moments of impact. My theory is that these moments of impact, these flashes of high intensity that completely turn our lives upside down actually end up defining who we are. The thing is each one of us is the sum total of every moment that we've ever experienced with all the people we've ever known. And it's these moments that become our history. Like our own personal greatest hits of memories that we play and replay in our minds over and over again.

The moment of impact. The moment of impact provides potential for change. It has ripple effects far beyond what we can predict. Sending some particles crashing together. Making them closer than before, while sending others spinning off into great ventures. Landing them where you've never thought you'd find them. That's the thing about moments like these. You can't, no matter how hard you try, control how it's gonna affect you. You just gotta let the colliding parts go where they may. And wait. For the next collision – Lexa, the vow.

It was a winter day when Clarke and Lexa had just gone to the movies. When they got out they noticed the snow outside the cinema. The sight was beautiful, all of the streets were covered with snow.

''Wow, it was barely an inch when we went in'' Lexa said with a smile.

''It's so beautiful Lexa'' Clarke said, whilst she was holding Lexa close to her. The two of them had been dating for over 4 years now. Everything went well with the two of them and they moved in together about a year ago. Clarke was sure of the decision she had made, and she never had any regrets whatsoever.

''It really is'' Lexa said with a smile, before leaning in to place a kiss on Clarke's head.

''We should get going, if we want to get home before the roads are to icy'' Lexa said.

''You're right. Let's go'' Clarke nodded at Lexa. After that they walked towards their car.

Clarke sat down in the passengers seat, and Lexa was scraping the ice of of the car.

Clarke was staring at Lexa through the front window and waved at her ''That's good, come in'' she said jokingly.

Lexa got in the car and smiled at her girlfriend ''I'm freezing'' she said with a grin on her face.

''Come her you'' Clarke said, after that she took Lexa's hand and held them tight. ''Maybe this will help she said joking.

Lexa leaned in for a quick kiss and after that she started the engine and drove away.

Lexa turned on the radio and put on their favorite song of all time, just a kiss from Lady Antebellum.

''I know you like this song Clarke'' she said teasingly.

''Damn you're right. I love it'' Clarke said laughing out loud. Lexa knew Clarke so well and that's what she loved about Lexa. Lexa was always there for her, no matter what. When they met 4 years ago, they had an instant connection with each other. They've only grown closer over the time. Now they're inseperable.

Lexa began to sing the song on the radio ''Lyin' here with you so close to me. It's hard to fight these feelings. When it feels so hard to breathe. Caught up in this moment. Caught up in your smile''.

''You do not like this song'' Clarke said, teasing Lexa.

Lexa laughed at Clarke, and began to sing even harder:''I've never opened up to anyone
So hard to hold back. When I'm holding you in my arms. We don't need to rush this. Let's just take it slow''.

''You have to turn it off'' Clarke said, whilst she was smiling at her girlfriend who looked so happy.

''I won't do that'' Lexa said, while singing along.

Lexa began to rock along with the song and Clarke couldn't stop laughing ''I'll make you diner for a week, just please stop''.

Lexa stopped singing when they stopped before traffic lights.

Clarke turned around to face Lexa, ''I have this theory, that people never break up when they get it on in their car'' Clarke said seducing Lexa.

''What?'' Lexa asked surprised while staring at her girlfriend, who had taken her seatbelt off before she leaned in to kiss her. Both of them go into it.

Lexa was so distracted that she didn't see the truck coming, who was driving towards them with full speed. The trucker wasn't able to stop in time and hit the car with full power. The front window of the car broke and Clarke was tossed out of her seat through the front window. She hit the glass with her head and landed on the hood. Both of them passed out instantly. The trucker got out his truck and called 911 as fast as he could. The emergency services arrived as fast as they could.

Clarke was hurt pretty bad and was rushed into the hospital. Lexa was hurt as well and both of them were unconscious. The paramedics brought them to the ER. Both of them were brough into churgery because of their injuries.

The next thing Lexa remembered was waking up in the hospital. Lexa was taken back in her mind tot he moment when she first met Clarke. It was one of her favorite moments ever.

Lexa walked into City Hall to get a new drivers license, because she lost hers on a holiday to Canada. That was the moment when she saw Clarke for the first time, standing in the waiting line in front of her. Her beautiful blue eyes lit up the whole room and Lexa was taken away by her beauty. When Clarke walked away when she got what she needed, Lexa turned around to look at her one more time. She smiled at Clarke and Clarke smiled right back. Lexa wouldn't say it was love at first sight, but there was an instant chemistry, by just looking at each other from across the room.

Lucky for her the two of them were destined to meet again just a few minutes later. When Lexa had received her new drivers license she walked out of City Hall to get her car. In that moment she saw the blonde girl waiting at the side for a cab. Lexa walked over to Clarke to offer her a ride to wherever she needed to go.

''Hey'' Lexa said politely.

Clarke turned around to face Lexa, that was when she realized it was the same girl from just before ''Hello stranger'' Clarke said with a big smile on her face.

''I see you're waiting for a cab, huh?'' Lexa asked.

Clarke nodded ''Yeah, I need to go home. But it looks like it going to take a while before another cab wil arrive. Luckily me, I had an appointment, but yeah looks like I'm going to have to cancel that''.

''I can give you a ride home if you want'' Lexa said, a bit embarrassed.

''I don't even know you'' Clarke said teasingly, while checking Lexa out. She looked at the athletic build brunette with those sparkly green eyes. The girl was hot as hell, Clarke had to give her that.

''But you will, if you come with me'' Lexa said winking at her.

''Alright'' Clarke nodded at Lexa.

Lexa motioned for Clarke to follow her and she walked back to her car. Lexa opened the passengers seat for Clarke before walking over to her side of the car. She buckled her seatbelt and started the engine. Clarke followed her and did the same.

''I'm Clarke by the way'' she said with a smile.

Lexa turned around and looked Clarke right in the eyes, she could get lost in Clarkes eyes right away. Ocean blue, she would describe them as. ''Nice to meet you Clarke, I'm Lexa'' Lexa said.

''That's a beautiful name'' Clarke said.

''Thank you. Like wise. Are you okay with me turning on the radio?'' she asked.

''I'm fine with that'' Clarke said with a smile.

''Alright. Where do I need to bring you too Clarke?'' Lexa asked.

''Well I needed to go home for an appointment, but they just cancelled so I am free''.

''What are you saying Clarke'' Lexa said teasing her. Clarke seemed to flirt with her too, so Lexa wasn't afraid to show herself to this perfect stranger.

''I think we owe it to ourselves to get a drink, outta respect for faith'' Clarke said blushing.

''Okay'' Lexa said grinning. ''I know just the right place''.

Lexa took Clarke to this perfect little coffee place. It was from her uncle Gustus. Lexa used to come there as a kid all the time. Her uncle was one of the most important people in her life. When Clarke and Lexa arrived at the cafe they had an instant click and it wasn't long after that when they began dating.

It wasn't long until Lexa was released from the hospital. She had been out of it for a few days but would be fine over time. Clarke was in bad shape and had an intracranial hemorrhage. What basically meant that she was bleeding inside her skull.

''You know your girlfriends ct-scan showed intracranial hemorrhaging. We purposely keep patients with traumatic brain injuries in a comatose state in order to calm their systems and allow the brain time to heal itself while it swelling subsides. Then we slowly wheem them off. We can never tell what the damage is until a person wakes up. Some people heal over time, others don't'' Clarkes doctor explained.

Lexa was listening to the doctor, but was so deep in her thoughts that she didn't hear everything the doctor was saying.

Days passed by and Clarke was still in a comatose state. Lexa visited all the time to be with her girlfriend. But everytime she was there she got reminded of her memories with Clarke and the thought that it may never be the same again made her sick in her stomach.

About a week later, the doctors said Clarke was ready to be waked. Lexa was right there when that happened.

''She's going to be a little out of it, so give her the time'' the doctor said.

Lexa nodded, but didn't answer because she was focused on her girlfriend. Clarke woke up a few seconds after that.

''Hey it's so good to see you'' Lexa said relieved.

''Clarke, it's okay. You're in the hospital. You've been in a car accident, you hit your head but you're okay. We kept you asleep for a little while'' the doctor said.

Clarke opened her eyes, her head hurt ''My head hurts'' she said to the doctor.

''That's perfectly normal'' the doctor said.

Clarke looked confused at everyone around her. ''Was anyone else hurt doctor?'' she asked.

''Uhum'' Lexa mumbled, confused at Clarke. ''Clarke? You know who I am right?'' she asked.

Clarke looked right through Lexa like she didn't know her. ''Uhm..I am your girlfriend'' Lexa said worried.

Clarke looked confused at Lexa, not knowing who she was. Lexa realised what was going on and couldn't take it so she left the room. She walked down the hallway away from Clarke, when the doctor followed her.

''You said things were very good'' Lexa said, not knowing what was going on.

''Brain injuries aren't predictable'' the doctor explained while stopping Lexa in her tracks.

''Due to the swelling, some impermeant can be normal'' the doctor said, trying to calm Lexa down. Who looked upset about the situation.

''Some impermeant?!'' she spat out. ''She doesn't remember me'' she said while holding back her tears.

The doctor tried to talk to Lexa but she couldn't take it so she walked away from her dissapearing into another hallway, leaving the hospital.