Beautiful thing. End of the video made me laugh, hahaha. And I agree with Graf - we could use that motion capture thing for some tricks and new animations like sitting/lying/whateva
You sure we can't use that dance?
It looks amazing and could be nice easter egg
Oh, and about minigun animation: IMNSHO it looks good as it is. After all he's dodging and using force of all body to move, so it's not only based on his arms strenght. Second thing is that barrel isn't the heaviest thing in the minigun, so it looks pretty balanced actually.