The main thing about the movie is the sound effects the antagonist will cycle the rifle spout some dialog threatening the protagonist if he leaves the booth, he will die and for no reason the sniper cycles the rifle again for dramatic effect, and did not fire round he had in there already, the people who made this movie obviously never seen any kind of firearm before and never intended to do any research on such a simple things as loading and unloading a bolt action rifle. The error just does not happen just once but I believe multiple time throughout the film.