Coordination

If you think you are coordinated and have control of your body's movements, then try this:

Lift your right foot off the floor.

Rotate it in a clockwise direction for about 10 seconds...

While your foot is rotating, use your right hand to draw an invisible 6 in the air...

Involuntarily, your right Foot will begin to rotate in a counter-clockwise direction, and there's nothing you can do about it.