As the title of this post states, the wheel below can be seen spinning in both directions. Don’t believe me? Try to concentrate on the outer rim first. You should automatically see the wheel spinning leftward. But if you notice the center cog, and start looking solely on it, it should help you see the wheel spinning in opposite direction – rightwards. With a little exercise, you should be able to switch it’s direction each second. Yeah, the illusion exploits some functions of our brain in a way I’m not sure I can understand. More info on this can be found inside the Spinning Girl article.