At first, the Doctor ignored Rose's warnings. He pushed himself up on his elbows, scanning the infirmary for any sign of where his trainers had gotten of to. They didn't appear to be nearby. Unfortunate, that. It meant more walking. Nothing to be done about it now, though, he decided, and that was when Rose put a hand to his chest to stop him getting up.
"No no no. I'm fine. I'm perfectly fine. If I need to have a word with this young man--Rex, did you say his name was?--I can man ... Ah!" The Doctor grimaced and sank back down against his pillow as his body reminded him that Rose was in fact right this time, and he was wrong.
"Or we could just stay here," he managed, closing his eyes until the vertigo passed. "Here is good. I like here. Especially when here includes you. I never should have left you."