From WNEP:

A woman was taken to the hospital with a gunshot wound to her leg after police say a vendor at the Eagle Arms Gun Show at the Bloomsburg Fairgrounds accidentally shot her on Saturday.

Police in Columbia County said vendor Geoffrey Hawk, the owner of “In Case of Emergency,” shot Krysta Gearhart of Orangeville in the thigh with a semi-automatic .380 while demonstrating a concealed carry holster. Usually, the demonstration is done with a plastic model of a gun.

There was no magazine in the pistol, but there was a round in the chamber.

I’m guessing that the seller didn’t close the deal.