An iconic part of New Zealand rugby is the haka.
The haka is a traditional Maoria dance w/ variations used to mark different occasions. It’s most often remembered as a war dance.
Our rugby team, the All Blacks, perform a haka before every test match.
The AB’s have a very nice description and history of the haka here.
James Joyce saw the haka performed in Paris in 1925 and wrote a modified version for Finnegans Wake.