"That's good." Jack curled his fingers around the Doctor's, squeezing lightly. "He'll be glad to see you show back up, if he's anything like I was then." Well, and if he didn't just smack the Doctor upside the back of the head for leaving his body behind in a station full of Dalek-dust and dead human bodies. Jack had contemplated doing just that when his Doctor showed up again - and had decided against it while resetting the Doctor's nose.
"It's probably a good thing you're from a different reality," Jack said with an amused smile. "You don't have getting your nose broken when you show up again to look forward to."