Good thread!
Was in a gun store that was large enough to have 2 gunsmiths. A guy brought in a 1911 .45 and stated the pistol would fire full auto. One of the gunsmiths picked up the pistol pointed it into a bullet trap and pulled the trigger. Sure enough, it was fully automatic, as the first bullet went into the trap, the rest made neat little .45 cal holes in a straight line up the wall and firing the last rounds into the ceiling. I'll never forget the look on the gunsmiths face.