"I don't know, I just don't wanna fall off!"

Grif's fast now, he guesses he could catch up with the train, but falling off would hurt and probably put him out of commission first. This sucks. This sucks and he hates it.

He pushes up off the roof and picks his way over closer to where Tsunami's head is, so he has to yell less.

"Alright you know what? I'm going in. I go in and you tear off the roof while I do that and maybe neither of us gets shot."

'Maybe neither of us gets shot' sounds pretty good and optimistic to him right now.