If clockwise, then you use more of the right side of the brain and vice versa.
Most of us would see the dancer turning anti-clockwise though you can try to focus and change the direction; see if you can do it.
- The Right Brain vs Left Brain, The Daily Telegraph
I saw it going clockwise and I can’t make it turn the other way! It’s like one of those hidden 3D pictures from like 10 years ago. I always had to struggle with making the figure pop out!
[via The Flog]