In this perticular video, you see the "All Blacks", a New Zealand rugby team, doing the "haka." The haka, aparently is a native dance of New Zealand that many rugby teams do, but the All Blacks are famous for. Personally, I would walk off the field, forfiet the game, and probably give the guy my first born if I were on the other side of that field, let alone play rugby against them.
~Nick
