When Christopher parachutes out of the back of the train, he is shown to be moving in the opposite direction of the train and slide back towards the tunnel entrance. The parachute would have slowed him down very quickly, but not instantly taken him from 200 mph in one direction to 10 mph in the other. See more
I got to warn you guys, if this gets violent, I'm gonna fight back.
Alfredo the Thug
You think you're gonna fight back?
All right, maybe fight back's a little misleading. I'll take the beating 'cause that's all you two amateurs are cleared to do. And then one night soon, I'm gonna break into your house and kill each of you in your sleep. Probably start with you, Alfredo. That way Steven here can have a few extra days with Marla and the girls. It's only fair.