I honestly think it's fake. I think they just recorded the movement into the computer before, and then hand someone swing the Wii Remote to make it appear like the robot was reacting to it. And think about it. Where would the sensor bar be? The Wii Remote doesn't have that long of a range. How did they hook up the robot to the Wii Remote in the first place even? Unless they got some help from Nintendo, there's no way they could of done this.