How many of us have had an accidental/negligent discharge of a firearm in the house? How many will admit it? Absolutely stupid and careless. Don't ask me how I know...
Never. Did once have an outdoor incident where a SxS set one off as the breech closed (a stuck firing pin on an old Parker). Dug a nice little hole in the ground in front of me. It was the PERFECT object lesson in why "keep the muzzle pointed in a safe direction at all times" is the thing that it is.
Oh, also did touch one off earlier than I meant to while handling someone else's race gun. Lighter trigger pull than I expected, and sent one down range a good four feet wide of the intended target. Safely into a berm, but it was still jarring. Another good argument for dry-firing alien guns before you go hot.
Nope, snap caps only in the house and I unload my HD firearms before I play with them.
Honey, I have no idea how that hole got in the wall!!