[Riley]

I find that ‘it went off while I was cleaning it’ is usually code for ‘I was doing something stupid, I knew better, and I’d rather not talk about it’.

[riverrunner]

Most likely a Glock and forgot to take the one out of the chamber then pull the trigger trying to take the slide off.

[Beowulf9]

It’s up there with when cheating on spouse ‘It just happened’

[bigbob]

Practicing his quick draw would be my guess

[Sopater]

I find that "it went off while I was cleaning it" is usually code for "I was doing something stupid, I knew better, and I'd rather not talk about it".