Aussie Hakken, better known as Gabber is a variation of the Hakkuh dance which originated in the Hardcore scene Holland.
It is commonly associated with Sydney's Adlays.

At raves, you can find most Lads or just ravers rocking it at Front-Left speaker.
It is sometimes spelt as "Gabba" due to the way it is pronounced by Australian's.
Aussie Hakken is a very basic dance and is done by that black kid on youtube. kidkash102.