He could feel her. It was very strange. She had been buzzing in his head since he woke up and could actually focus on anything other than the pain from almost dying. She was quite a woman. He kind of chalked up his ability to feel her the left over juice from his time as God. He'd probably know about her presence without it though. He was a fairly perceptive human and Rose had talked quite a bit about the TARDIS.

Castiel didn't have time to grab anything to hold onto when the console room shook. He stumbled backwards into a hand railing. He reached behind him and gripped it tightly in an effort to stay vertical. He had already fallen on the grating once. It was not a pleasant feeling. He did not want to revisit that. So he clung to the railing and he looked over at Rose with wide eyes.

It wasn't long before if stopped and had engaged in what some would call "smooth sailing". He let go of the railing and made his way to Rose a little quicker than he probably should. He put a hand on her upper arm and leaned towards her to whisper. "You did not mention that she did that." Scared? Not so much. Confused and a little shaken? Yes. Very much so.