This is so funny that it will blow your mind. And you will keep
trying at least 50 more times to see if you can outsmart your foot, but
you can't.
While sitting at your desk, 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!
This has kept me amused for the last half an hour. Enjoy