ND, hmmmmm...
In the home: not by me, but my brother was dry firing a new 1911 and touched a round off while pointing at my kitchen floor between his feet--I was seated nearby; fragments of tile hurt about as much as fragments of lead!
Broke the 180 once after abruptly switching guns at the start of an IPSC match--first and only DQ. Fired at a target to my left after taking about 1 step further downrange than allowed. Does that count?
And during an RO seminar, simulation section: I played the shooter with a live round after unloading and showing clear: ...if you are finished, unload and show clear (older format). Gun clear, hammer down. BANG! I don't think that counts for the poll, but it sure brought the entire class to a new state of awareness!
I follow the safe gun handling rules like a religion, but I keep a first-aid kit with major trauma capability right next to the gun safe. Arrogance with a gun falls under Pride---a deadly sin.