Michael Kordahi, a developer evangelist in the team I'm in sends this picture around today of a spinning dancer. Its a test to see which side of your brain you predominantly think with. Right brain thinkers see her spin clockwise. Left brain thinkers see her spin anticlockwise.
In my instance I saw her spin anticlockwise but the moment I started thinking logically she switched directions, or should I say, my brain switched directions!! How spinny is that??
Check it out for yourself! Which one are you?