cool, it's called the Haka or war chant, I have seen the All Blacks rugby team in New Zealand do it and when the are playing another Polynesian based team and both line up an do it WOW.
It seems like they do the Haka for everything. I wouldn't be suprised if they do it before a game of Monopoly. My only thing is if you lose after doing something like that, you look like an idiot.
Don't get the tongue business, having to face that I don't know if I would run and hide or roll in the grass laughing. Didn't know they did it for all sports, I thought it was a rugby thing. Cool vid