Haka are best described as challenges. They are used to make a point and to vent anger… They are vocal performances involving rhythmic declamation in triple metre and aggressive or challenging facial expressions (pūkana, literally “glaring”), body movements and demeanour. The men make heavy use of foot stamping, body percussion, and grimace in an attempt to appear as menacing as possible.
We loved this. And I got a bonus: after the video ended, my co-editor attempted his own Haka dance, facial expressions included. Awesome.