• Find a friend or other willing volunteer. Find a friend or other willing volunteer. • Ask the person to sit or stand still. Ask the person to sit or stand still. • Take your hand and bend your fingers, as if you are holding a ball or playing the piano. Take your hand and bend your fingers, as if you are holding a ball or playing the piano. You should place all five of your fingertips on their head. • Hit the knuckles of the hand that is on the person’s head with the palm of your other hand. [Hit the knuckles of the hand that is on the person’s head with the palm of your other hand. If this is done correctly, the person should hear a cracking sound. Use your hands to pretend yolk is running down the person’s head. Use your hands to pretend yolk is running down the person’s head.