Now, as far as the animation goes, it's fluid, on the most part. You have some really good movements in there and the people react accordingly. But I saw a few movements where they were awkward or didn't have enough anticipation, especially in the parts with the knife. It didn't seem like there was enough force behind it. Your particle effects can use a little work, too.
This is a personal taste thing, but I think that your sticks are pretty frickin' short. But that's just taste and I won't penalize you for that.
Now, you say this is an RHG demo, but what the hell is your guy's ability? You definitely don't make that clear in your animation, and for that, you're losing a point.
But as an animation it's not half bad.