This is exactly why people shouldn't be allowed to carry these things. Arming everyone to the teeth is the stupidest tactic against crime one can conceive. To all those who say, 'Well he didn't have time to think' you are exactly right, he didn't.. he was startled and immediately decided to kill someone. Is that what we are turning into? Will we soon be bumping into each other on the streets and shooting each other dead over such collisions? Killing someone abruptly from being startled could be equated to other sudden killings, like killings of anger. Both hit you out of nowhere and prey on your baser instincts reflexively. Which is why you shouldn't be carrying an instrument of death if you are the kind of person to be so rash. Yes, he did have a right to defend himself, both morally and legally, but self defense is only justifiable by the severity of the danger. So if the danger is unknown it's ok to murder everyone around you as fast as you can? Or if not that, it's ok to shoot someone dead in a fistfight? Saying this guy was right is answering yes to one or both of those.
This could have been worse, considering two kids were involved it could have been a prank, by strangers or friends. That's not an exaggeration, that kind of catastrophe has happened before and is just another good reason why people shouldn't be allowed to kill on a whim. Those could have been completely innocent lives, and what's worse bystanders could have been there and got wounded or killed to with those 8 shots being fired so frantically. I believe this victim is as much a danger to society as his assailants... well, no, he's even more so, he has a gun and he's more then willing to kill without thinking. I can't say the same for those teenagers.
For the record, no, I wouldn't have killed the kid. Yes I know you cannot think in a sudden dangerous situation, but believe it or not everyone isn't so volatile. Killing the other person isn't the first thing that comes to my mind in a dire situation. For all who said it was, I worry about you... that's not healthy. Considering that these were just teenagers and not mob bosses, the guy could have just as easily pointed the gun at them and backed away. If I possessed such a weapon, that's exactly what it would be for. And if that does not work we could always fire surface to air missiles at them and roll in a few tanks, since it's so chic to be excessively deadly to kids'n all.