"I'll take that as ohshit."

Everything is going fine, and then suddenly the entire bike is careening out of control, and the damn thing runs on steam. It might not be likely to explode -- not ruling it out, things can always get worse -- but it's liable to scald, or-

Yeah, or worse, because he's tipping over, it's going to come down on top of him.

I launch into a run after him and the bike, skidding past the same patch of slush as I pursue. He's going faster than I am, but that's not going to remain so, and that's... that's going to be bad.