A multi-feed video montage put together by ‪@MilkBarTV‬ uses video clips from different angles to show the chaos in the agonizing 120 seconds preceding the failed Trump assassination. At the 1:55 second mark of that compilation, a male voice yells "He's got a gun!" The film, taken by an rally attendee, gets very shaky at that stage.
The first shot, which is a light sounding pop, is 5 seconds later.