Well, in my opinion, that was about the worst "black belt" I have ever seen, both in discipline and in actual practice. I am by no means a ranked fighter in any style and I think I could have kicked that SOB's ass. What a piece of shit that absolutely has no control of himself in any fashion. If that kid was a friend or family member of mine, the courts would not need to go after that SOB.
I have to say i fully agree with everyword Jeff.
What a bunch of punks, you can see that the "blackbelt"

was out of control when he lost control of his emotions..."MOTHERF#CKER!" and such followed by knees to the head.
I cant imagine just standing there and watching someone doing that and not stoping the peice of shit...when the kid said ok....dont do that again...or we are finish...or stop i dont want to fight you...it should have been done!
For me this kind of thing makes me want to train more and harder so i or someone else are never left to the mercy of someone as such, who obviously has not a bit of the stuff.
But i guess you understand what i am saying, werent you a leo jeff? If so wasnt that the same reason you were in that job feild, to keep people from taking advantage of others?