New Zealand Under 20s have been criticised after performing a two-minute long Haka ahead of their World Championship opener against Wales.
The ceremonial Māori war dance has been made world famous by the All Blacks but is also used across other sports and at special occasions, as a display of a tribe's pride, strength and unity.
It's often a thing of beauty, with whole stadiums falling quiet to honour the spine-tingling tradition as rival teams stare them down, ready for battle.
