
Visible crew/equipment: In the last fight scene with John and Christian, Christian jumps out of the train and disarms the nuke with the remote and the nuke goes through John Travolta, but in slow motion you can clearly see a cheap dummy with white shoes on when he gets hit and flies out.
Answer: Funnily enough, it is actually often referred to as the "Howie Scream," in reference to this film, which famously used it. It's a stock sound effect that's been in use since at least 1980. It's also referred to as "Screams 3; Man, Gut-Wrenching Scream and Fall into Distance," which was presumably the title of the track in the music library it's from.
TedStixon