They both froze at the same time, Rose with her hands in his hair and he in the act of swinging his arms about like the hands off a deranged clock face

This moment is simultaneously innocently cute and hugely awkward. Very nice.

But if he was going to pretend that everything was fine then she could too.

Oh, this'll go well.

“You could change back,” Rose blurted suddenly and the Doctor faltered. “If you wanted.”

If she's messed up enough to be this tactless, it hasn't been going well. *keeps reading* oh... oh dear. The Doctor must think his companion's losing it for real.

...Oh god, Jackie's going to regenerate him. Twice.