He wasn't in danger before getting it. He removed himself from all potential danger when he went inside. Then he came back out with a gun and it escalated. He's a big man when he has a gun. Both are idiots. It got a little physical, then he backed up, away from the guy a safe distance, and with no danger to himself at all at the moment, killed the guy. Not at all justified, big picture. Not with the way it happened.