How do you even begin to choreograph this!?

I came across this CG fight movie using the main Halo character and Metroid and damn it is so beautiful. I just can't explain the sheer awesomeness of the moves, how do you even come up with stuff like that!? I have no clue but the guy that put this CG movie together is pure genius and hilarious! Awww man, I've seen it 5 times over and I still can't stop watching it.