What happens when you add PC Kinect support to renowned sandbox Source game Garry's Mod? Happiness!
Support arrives this week or next according to PCGamesN, and when it does, you'll be able to assume direct control of the many Half-Life etc. characters/models in Garry's Mod.
You could make them dance, you could make them swing things around, smashing the virtual place up. Or you could make them behave in a believable way with no need to animate, which also makes this quite exciting.
Luckily Garry Newman, maker of Garry's Mod, videoed his many trial and error attempts at getting Kinect to work properly with his sandbox game.