Monkey does the moonwalk. Peacock does the cha-cha-cha. But all Little Piggy does is worry.   Little Piggy is lead to believe he just can't dance. He aspires to dance the nut brush like his friend squirrel and the locomotion like Llama but he just lacks self belief.   Until one day his tail begins to twitch and his knees begin to quiver and Little Piggy discovers his own very special style of dance.