Studies have suggested that within an average sized group of friends at least one will be hiding a gambling addiction . . . . my money's on Bob.
Sit down in a chair then lift your right foot off the ground and continue to move your foot in a clockwise direction. When you are doing this, raise your right arm in the air and draw the number '6' That will now have you moving your foot in the opposite direction and you won't be able to stop it.