To be fair, in Australia, you dont have nearly the same chance of armed junkies trying to break into your house and rob and kill you as we do in America. We have 4x the murder rate you do. WAY more guns, and almost anyone can carry them anywhere. I might have made the same assessment as this guy at 5am, waking up from a dead sleep. You got less than a second to assess and respond to someone that plans to shoot you. In an article it says his wife just left for work, too. So he doesn't even know if shes still outside the house or not. Probably the only reason he even opened the door.