Ivy from Namco's Soulcalibur fighting game series is perhaps best known for her ample endowments and her unique sword. When combined with Kinect motion capture, Ivy's extreme anatomy doesn't hold up very well.
The creator of this real-time motion capture Kinect hack explains this as "a physics simulation of 2 capsules on dual-axis hinges, with high bounce and barely-existent gravity factors", or "extreme jiggling" of "moon-boobs" in layman's terms. Prepare to be slightly creeped out by... so many things in this NSFW video.
Noesis mocap - Extreme boobie jiggling [YouTube - Thanks Gambit09!]