The cameraman didn't react. This indicates that he knew the fellow firing blanks was going to walk into the room.So, if a guy with an AK-47 walks into a room in which you're talking to a friend,
as he appears to begin to fire, you dive under the table to escape a hail of bullets...
later you realize that the guy was firing blanks to scare the Hell out of someone.
By your definition, your "reaction was faked" because you weren't genuinely under fire the moment you dove?