The Doctor woke up to a horrible screeching sound, followed by loud pulsations of some sort. Possibilities swirled through his mind: a TARDIS alert? Some kind of outer threat?

He hurried out of his bed and bumped his head on one of his new inventions, a departiculator, which in his own words "made stuff turn to confetti then back again." "Oww…" he whined, before starting to curse in Gallifreyan. If the TARDIS had eyes, she would have rolled them. But she didn't, another fact that constantly made her want to sigh, which in turn reminded her she couldn't do that either. She resorted to sending her emotion of impatience to the Doctor's mind.

"Yes, right, sorry," he said to no one in particular, and rubbing his head, he left his room.

He yawned, and began to talk to himself.

"Right, so we're still in the vortex, so it couldn't be an outside threat. No TARDIS malfunctions, so maybe an auxiliary alarm?" He winced when he heard the sound again.

It took him a while to work out that it was coming from a separate source from the inside. The TARDIS thought it took him a ridiculously long time to work that out, compared to how fast she'd done it. But, well, she was a TARDIS.

The TARDIS knew exactly at which moment he figured out the noise was coming from Rose's room, because that was when the Doctor yelped her name and started running.

The TARDIS chuckled, a low, rumbling sound echoing from the engines. The Doctor finally wrenched Rose's door open.

"Wait… Are you singing along to the alarm?" he asked, running his hand through his hair in disbelief.

Rose clicked her speaker off. "Alarm? It's music," she said.

"But… but… the pulsations!"

"The beat."

"The wailing!"

"The singing."

"The shrill, high pitched, rotor noises!"

"Guitars!" said Rose, throwing her hands up in exasperation.

"Wait, why are you listening to music in the middle of the night?"

"Couldn't sleep."

"What time is it?"

"What kind of question is that?" Rose demanded. "Do you mean, how long have we been asleep? What time it is where we last were? What time it will be if we landed just now?"

This time it was two hands he ran through his hair, and the TARDIS did him a favor and teleported him out of her room. The music resumed for a second, before stopping completely.

The Doctor knew, telepathically, that Rose's room had been soundproofed. "Thanks, old girl," he said, patting her on one of her walls. He stifled a yawn and made his way to his room. The TARDIS decided to be nice this time and not switch his room with the pool.

That had been one hell of a scream last time.