I have attended hundreds of gun shows as a vendor. I know of two weapons discharged during a gun show. One I heard about from other vendors the week after it happened and one I heard because I was in the facility when it happened. Both were by vendors who were setting up their tables and accidentally discharged one of their "unloaded" weapons. No injuries in either case -- both vendor's were banned for life by the gun show host.
One was in Wichita Falls Texas. Why a vender would have live ammo in a weapon is beyond me. :Shrug: They deserve to be banned for life.:clapping: