Are you left- or right-brained? I see a clockwise rotation. Must be why I'm a systems engineer. =O)
I find if I focus on the shadow, I can get the shadow and her left (stationary) foot to rotate counterclockwise while still seeing the dancer rotating clockwise. However, this only works if I can't see her head.
Edit: Just managed to get the whole body to rotate counterclockwise. Freaky.