I found this last week on a college forum, after about a minute or two I was too creeped out to continue, especially after I noticed her hip bones.
I saw that on my 3 wheeler forum a few weeks ago. I thought it was a little disturbing because of the body contortions
another cool one.... click start and hold your left mouse button down... http://www.ebaumsworld.com/flash/supercoolpicillusion.html