This is so almost disturbing because I don't understand how this works: You can determine the way your brain is wired (left-side or right-side dominant) by looking at the picture below!!!!!
This silhouette of a lovely lady rotates clockwise or anti-clockwise, depends on how your brain is wired.
http://www.ebaumsworld.com/pictures/view/41127/ What seem to be happening that for some people the direction of rotation keeps changing..