How could they bail out if it exploded? I've watched that scene many times both before the movie was released, and after I got the DVD, and I didn't see anyone bail out.
I do know for sure those two guys bullying Banner are dead, no one survives being thrown at a force like that. That's two, also including the guy he threw into the wall, the people in the humvee, the people he smashed with the humvee, and the people killed from the explosion when he threw the engine at the other humvee. That's one big body count.