True, I didn't see it, but my friend, as a kid went with his father to the gun store to return an Ithica Pump shotty that would fire whenever a round was racked into the chamber (slam firing, but without a finger depressing the trigger).
Told the young man behind the counter what is was doing, Young man said, hmm, let me take a lok at that. Before anyone could stop him, he popped a live roun into the tube, racked it and destroyed the display case between them. . .