Not me, but an innocent bystander caught a piece of bullet jacket whilst I was attempting to clear a Frommer stop. (Barely broke the skin.) Bullet went straight down and disintigrated on the concrete floor about 2-3" from my feet. "New" weapon. Major errors on my part?- Did not remove the magazine, but merely looked inside the ejection port and didn't see anything- not even the mag, which I thought was in my pocket. (Small grip, so hand covered the bottom.) Let the slide go, but felt no tactile sign of a round loading. But rather than handing it off to the next fellow, who would have checked it again, I attempted to ease the hammer down by holding onto it whilst pulling the trigger. Nope! Hammer wouldn't go. Mystified, I tried it several more times, Holding the hammer back whilst pulling the trigger to the rear. Finally, frustrated that it wouldn't lower slowly, i just pulled the trigger whilst pointing it in a reasonably safe direction. (It was an uncontrolled area, and people were milling about- most with guns.)

Don't rememeber the noise so much as the dark orange muzzle blast. Made folk stop! Later, one fellow shows me a scratch on his belly- didn't penetrate the skin.

Discovered later that the mag was wrong- too short by a little- being an FN mag, and wasn't the one for the pistol. Never fed reliably again! Don't know where it came from, BTW.

Also discovered that the pistol's disconnector works unlike all others of which I'm familiar. The act of pulling the trigger past a certain point, just beyond the the sear release, trips the sear and re-engages it.

SO, ALWAYS remove the mag (even if there isn't supposed to be one) FIRST, before continuing a clearance drill.

Thirty years ago or so and STILL fresh in the mind. Oddly, this was a period of 2-3 years where almost every gun guy I knew had some incident with a firearm, including an NRA instructor.