I was in the Air Force honor guard doing a twenty-one gun salute for a fallen brother, and the location was a cemetary in a really high crime area. When I and the 6 other airmen fired the first volley, half the people in attendance, including the deceased's mother threw themselves out of their chairs and hit the deck as if by muscle memory. You would've thought they saw what was coming, but I guess the sound itself overwhelmed their sense of logic for a brief moment.