Yep, it happens around the nipples. Back in 1973, I had an original 1851 Colt Navy that I loaned to a gal to have used in a play once. I loaded all six chambers with powder, wad and grease over them. I thought it'd be better to have all the chambers at the ready because I couldn't be sure if they'd index the loaded chamber correctly for the moment the hero needed to fire up into the air. However, the caps that I used were too big and so I "pinched" them so that they wouldn't fall off. In so doing, they opened up at the opposite sides, exposing the flash holes in the nipples to fire from adjoining nipples. Well, the moment came and I was standing off stage watching to see if everything went off correctly. The hero pointed the old original navy up into the air and pulled the trigger. It was a real good thing that the play was outside because there was a tremendous roar as all of the chambers ingnited in rapid succession like a volley from a firing squad. The audience was silent as the roar of the old pistol echoed across the valley and back again in the night. There were pieces of flaming toilet paper floating down from high in the sky, down...down...and one of them, still lit, landed on top of the hair of the hero. Well he must've had some type of hair spray on because his hair started to sizzle and smoke like Black Beards fuse lit beard. It was pretty funny as he went through his lines real quick in order to get the hell off of the stage to put his hair out.