1. While sitting at your desk in front of your computer, lift your right foot off the floor and make clockwise circles.

2. Now, while doing this, draw the number '6' in the air with your right hand. If your foot doesn't continue in the clockwise direction... and changes direction, well; I don't know what to tell you...

(I can't even do it when only thinking of it -- let alone actually going thru the motion... )