I KNEW IT WAS A HAKA!
That's right, Jason Momoa, HBO's "noble savage" got the part by performing a haka for the casting directors.
I knew the first time I saw that scene that Momoa had absolutely drawn inspiration for that scene from the haka. Here's the official New Zealand and Tonga rugby versions:
And, since this is after all a cooking blog, the same..performed by gingerbread men: