it doesn't quite look like he's dancing. more like he's just flailing around like his keys were set at random. i'd focus on mimicking some real dance moves and paying attention to how he would actually move with regards to how his weight would shift, etc.. it looks like his torso is pulling his legs around, when really his legs would be driving his torso movement, and when his legs move he doesn't really counterbalance the weight or anything.

i think it would be really funny if it were more realistic.