There are several of these videos, far more graphic, over at Youtube from last weekend. (You'll see most of them on the right.) It's some St. Pat's party from Albany, New York but that's about all I know.
I can't tell you how much this puts me over the edge. Just random violence all for the sake of "partying".
And did you notice that there is no looting in Japan right now? It's just not part of their culture to act like a fool.