Here is another one. 
Take your 2 hands and point your index fingers at each other (ET like) now try to make the tip of one finger make a circle on direction, and the other fingertip make a circle the other direction. Usually most people’s fingers go in the same direction, but you can get them to with practice. I think it’s just because in life often we have to make our extremities to go the same way, e.g.: both hands on a crank, jumping left and right, etc. I think with practice we can teach our bodies to behave as we want them to, but like anything takes practice…
Ok, I just rambled… um…. GO COOLMAPHONES! 