Doubling ?

[Lugerdoc]

Fasted, I seriously doubt that the round into the ceiling fired outside of the chamber. Obviously, your friend allow his wrist to break on the recoil of the first round and that is where the barrel was pointed. It sounds like your firing pin to sear overlap is worn and the luger is not cocking properly after each round. You will probably have to replace one of these two parts or if the PO8 is matching, have a competent gunsmith "square up" the engagement. Tom H.