When the second helicoptor falls back away from the side of the train car is crashes on, in other words the side that the helicoptor falls on is the one you want to be furthest away from, it's the impact that kills you fire and all that, also look out for a baddie on fire that comes running out with a gun firing at you. I hope this helps, If I'm misunderstanding you on this i'm sorry, I answered as best as I could.