Shedding Leopard Gecko

While I was searching my photos on Facebook I came across these two pictures of "Happy" one of our Leopard Geckos. When we first got "him" he had a lavendar spot on his back and spots that formed a perfect smiley face. The lavendar has since faded and the spots arent as distinct anymore. Anyway here he is shedding. He rubbed against a rock to loosen the skin:

 

 Then he kept biting at the skin and rubbing until he shed it all. It's gross, but they eat the skin. Apparently lots of nutrients and vitamins in it.