A case of the little head doing the thinking and the big head ends up with the results. Actually, this pretty much fits a lot of accidental shootings. Drinking affects judgement; so lets breakout the gun and show off; then boom. It's an accidental shooting because he didn't intend to shoot himself, mistakinly believing he gun wasn't loaded otherwise it's a suicide attempt.

All kidding aside, a tragedy none the less. I hope he recovers.