My wife's father is a veteran and in charge of funerals for service members in the St. George, Utah area. Great guy. He does 3-5 funerals each weekend with a 21-gun salute and color guard. He keeps their guns locked in a safe and he's fanatical about keeping them clean and in good working order. He was in the military police. He also hunts in deer season.
I don't know how long ago this was, but one of his older teens got ahold of one of the guns, maybe when it was out being cleaned after a funeral? He loaded a bullet in the chamber just to see how the action worked and somehow it went off in the living room. It went through a wall and through the crowded kitchen dining area where guests were, and then out the kitchen window. It missed everyone. The family still talks about where it entered and exited and somehow went through a crowd of people without hurting anyone.
That was one of two incidents the fam talks about all the time.