The Haka, a traditional Maori tribal warrior ritual, is performed by the All-Blacks - the storied New Zealand national rugby team before each match. Even when the All Blacks play overseas, the fans go wild when they do this ritual. If this doesn't intimidate opponents, nothing will. Check out the sheer intensity and raw testosterone behind this Haka performed by this burly bunch of jocks ready to rip off their opponents' heads. They apparently do a number of different ones. This one on YouTube must translate to the Bill Callahan Haka:
http://www.youtube.com/watch?v=CFF2P...elated&search=