The gingerbread men were made using a gingerbread man cookie cutter of course!. His arms were supported during baking. This was achieved by folding a piece of card, to give it a slight rise and propping it under each arm.
For my Overseas readers Wikipedia's (the free encyclopedia) definition of the haka (and use in popular culture)
In addition to this planned, formalised usage, teams and supporters now often perform impromptu haka as a celebration or encouragement.