Grab a sheet of paper and something to write with and sit on a chair. Stretch one leg and rotate your foot clockwise. Try to draw the number
6 on paper or in the air while still rotating your foot. This task is so much a struggle because the left area of your brain can’t handle two opposite rotations at the same time. That’s why the brain tries to bring all movements in the same direction. Only a few people can manage it from the first attempt. You can also try to write other numbers and watch the funny results. Seems like the foot has no problem only with zero.