Reasonable on 18 January 2011
Gotta say that looks fake to me. Colour me surprised otherwise, but I don't see any movement correlation between the character movement and the player. He seems to be shooting but I don't see how he's making those very fast, smooth turns and forward/back movements while apparently sitting still.
He might be triggering the shooting but I'm suspicious there's some other input or macro handling the movement. I've used Kinect that looks pretty suspicous vs normal movement needed to register an input based on my experience and how he's moving.
I'll have to file this under disbelief for now and await further evidence.
Try to be reasonable... its easier than you think...
