Check out the spinning lady. Which way is she spinning?
Some people see her spinning clockwise and some counter-clockwise.
This is not a trick.
And what's really cool is, if you stare at it long enough (different people focus on different parts of her body to do this), she might change directions.
Now, in THEORY, if you see her spin clockwise, you are right-brained.
And in THEORY, if you see her spin counter-clockwise, you are left-brained.
(I am not sure the definitions are quite that easy, especially since you can perceive her changing directions, but it's cool nonetheless.)
And to refresh your memory, thanks to this site, I remind you:
The Left Brain
...is associated with verbal, logical, and analytical thinking. It excels in naming and categorizing things, symbolic abstraction, speech, reading, writing, arithmetic. The left brain is very linear...
The Right Brain
...functions in a non-verbal manner and excels in visual, spatial, perceptual, and intuitive information. The right brain processes information differently than the left brain. For the right brain, processing happens very quickly and the style of processing is nonlinear and nonsequential...The right brain has been associated with the realm of creativity.
So I ask, which way does she spin for you?
(My answer is in the comments.)