ok, here's what happened..
so he was on the throne, pinchin' one off, and had no holster or whatever - just g-styling the thing in his waistband (I've done it, on a trip to 7-11 for nachos) so he had to rest it somewhere cause the tp dispenser is too round to set a gun on it without it sliding off. so he had it setting on his knee and when he went to wipe, it slipped off his knee - and he grabbed for it and caught it.. right in the trigger guard and popped one off with his thumb.. that's how I see it as going down. oops.