"Man fires gun at a Sandy, Utah gun show --- Sept. 25,2016 --- injuring two teens.
http://ksl.com/?sid=41616508&nid=148&title=man-fires-gun-at-sandy-gun-show-injuring-two-teens
Putting myself in his shoes...at the gun show: I would have opened the bolt slightly to show "clear" {empty chamber}{but not far enough to feed another round}, then remove the magazine to show "clear" --- Performing the operation twice in succession, and not dry fire the gun while pointed at the floor, but at a unoccupied ceiling fixture.
http://ksl.com/?sid=41616508&nid=148&title=man-fires-gun-at-sandy-gun-show-injuring-two-teens
Putting myself in his shoes...at the gun show: I would have opened the bolt slightly to show "clear" {empty chamber}{but not far enough to feed another round}, then remove the magazine to show "clear" --- Performing the operation twice in succession, and not dry fire the gun while pointed at the floor, but at a unoccupied ceiling fixture.