[@1n5tant Ar50n] You forget that Ash is mentally unstable and just doesn't give a shit xD 

Also since he just shot blanks it wouldn't leave any damage, maybe smoke on the ceiling. And with the short barrel the sound would probably be less concentrated, and it's not quite a 12 gauge. Maybe an ear ringing if you were right next to it, but nobody would be deaf. That and depends on how big the room is. But for RP sake we'll just say it was a very loud sound and flash.