Look at the image below carefully and ask yourself — which way is she turning?
According to Pairacy’s blog, you are using your right brain if you see her turning clockwise, and your left brain if you see her turning counter-clockwise. Supposedly, if you can see her turning both ways, then you have an IQ of 160 or more. Therefore, I feel no shame in admitting that I am, indeed, a super genius.
Thanks again to Pai for his post (hey Pai, it would be good blogging etiquette if you could quote the original source of this image if you still remember where you took it from).