This will boggle your mind and you will keep you trying over and over again to see if you can outsmart your foot, but you can't. It's pre-programmed in your brain!
1. Without anyone watching you (they will think you are GOOFY!!) and while sitting at your desk in front of your computer, lift your right foot off the floor and make clockwise circles with it.
2. Now, while doing this, draw the number '6' in the air with your right hand. Your foot will change direction. I told you so!!! And there's nothing you can do about it! You and I both know how stupid it is, but before the day is done you are going to try it again, if you've not already done so.