Why do I keep reading about these fools that were "cleaning" their guns and they went off? In this case, he didn't think it fired? Probably thought that loud sound was just his meth lab exploding again.
Really stupid people like this should not own guns!
(Or be allowed to reproduce for that matter.) If I were king like Obama I concentrate my efforts at gun control in dealing with the minority of people like this, and not the majority who are responsible and safe.