i have not had an ND or AD
well, except for the one or two times I fired a split second before meaning to at the range. those were instances of me trying to get myself to be "surprised" by the gun's discharge, and understandably led to several "surprising" discharges (i was practicing trigger and breath control).
HOWEVER
i saw a pretty scary ND last sunday at my range. some fat moron with a spas-12'd up mossberg has been blowing birdshot at MY target frame set at fifty yards because like a true idiot he had placed his own target out at about 100 yards. unhappy with the results of his first 30 shots, he had decided to simply switch over and start blasting my own personal target - my target which i had built personally, and paid for!
looking through my scope, i could actually see the impacts of the birdshot pellets, and so i turned around to ask the guy what the hell he was doing (btw, i am a pretty friendly range guy. this moron had, as a matter of fact, been borrowing my spooter scope between rounds... what nerve!).
he notices me looking at him with a grim demeanor, and lowers his shotgun. he's still looking back at me with an uncertain expression on his face and the shotgun is still moving downwards when.. BOOM.
he's surprised, looks at his gun like it did it all on his own (stupid finger on trigger behavior accounted for the ND), and pretends like it wasn't an ND.
the morons then proceed to haul out a plastic kid's giraffe and shoot at it with their rifles and shotguns from about, oh, two feet away. straight at it and down, into the rocks at their feet, about half a yard away from the concrete line. mind you, the ROs wouldn't let me zero in my scope at 25 yards, but either didn't see or choose to do anything about this behavior. one moron even stepped BEHIND the firing line by several feet to get a better shot at the point-blank giraffe.
i had been there for four hours, having a good time, but i finished my mauser's magazine, went up to the shack, reported that they had a group of morons who were sending up birdshot ricochets, and left.