Which way do you see the dancer turn? If you see her turn clockwise, then you use more of your right side of your brain, and vice versa you use the left side of your brain (the text information in the beginning of the film is wrong…) However, most people will see the dancer turning anti-clockwise.
Normally you say that the right side of the brain is more creative orientated and the left side more logic. According to me the dancer turns clockwise! Do the test with your friends, it’s quite astonishing to see that different people see the dancer turn in different directions.