got this from a mail:

Can you trick your foot? How smart is your right foot? This is so funny
that it will boggle your mind. And you will keep trying to see if you
can outsmart your foot--but you can't.

While sitting, lift your right foot off the floor and make clockwise
circles. Now, while doing this, draw the number "6" in the air with your
right hand. Your foot will change direction!