Which way she spins for you, will tell you which side of the brain you normally think from.
http://www.news.com.au/dailytelegrap...012895,00.html
at first I thought it was a gif that would randomly change the direction, until I got someone in the office to look at it at the same time. The saw it moving in the opposite direction than me.
You can actually change here direction at will once you now how. Do some multiplication in your head to make her spin anti clockwise and think of something like mixing paint colours to activate the right side of the brain.
It will spin you out.