You burning to death, I imagine.

[He'll try to bring him up gently, but without looking overly worried about the experience, even though he sure is feeling some kind of way and dislikes it greatly.]

The water likely wasn't pleasant, but on a scale of the two, this was less likely to kill you immediately.

[Kravitz isn't sure Tim has the energy to make jokes about death saving his life or refusing to let him cross, but he's anticipating it regardless.]