I witnessed an accidental discharge @ the last match
I shot in an indoor USPSA match at my local club last weekend.
One of the shooters had an accidental discharge. He's new to action type shooting, and got a little ahead of himself and was trying to move and release a magazine at the same time while his finger was in the trigger-guard, and he put a round into one of the prop walls used as part of the stage design.
This resulted in an instant match DQ. He was quite mortified. However, to his great credit, he had a good attitude about the whole event, took it as a learning experience, and stayed for the rest of the match and helped paste targets.
(I guess a few of the guys worked with him a little bit after the match was over. He also came to our informal club match on Tuesday night)
New shooters often try to go too fast before they're ready. Sometimes this results in an accidental discharge. In this case, there were no negative results because he had good muzzle discipline and kept pointed in down range, even though he did manage to shoot a wall . . .
(He was using 115 grn hollowpoint ammo in a Springfield XD. After some searching, his bullet was found lying on the floor. The hollow point cavity was plugged with particle board and the bullet did not expand or deform in any way)
You can only learn from experience if you pay attention!