I carry at least a knife at all times. The only time I put them down is when I am at home or somewhere naked.
Based on just what is in the video, I call self defense. The kids were obviously trying to intimidate the guy. You could see his face when they were sticking the phone in his face and tell that he was getting worried about the situation. When he tried to get sway, they got in his face. Pushing him down and surrounding him was the last straw. With that many idiots against me, I would have done the same. If he were truly out to murder them, he wouldn't have stopped when he got away, he could have easily have killed more of them. In my mind, he defended himself, got an opening and took it to escape.
Based on just what is in the video, I call self defense. The kids were obviously trying to intimidate the guy. You could see his face when they were sticking the phone in his face and tell that he was getting worried about the situation. When he tried to get sway, they got in his face. Pushing him down and surrounding him was the last straw. With that many idiots against me, I would have done the same. If he were truly out to murder them, he wouldn't have stopped when he got away, he could have easily have killed more of them. In my mind, he defended himself, got an opening and took it to escape.