One of the craziest Muppets has to be Animal and if you like crazy then you should have a look at this iPhone case.
This iPhone 4s and 4 case made by Speck is a great way to protect you iPhone and it even looks amazing to.
On the back of this case you find a fun picture of Animal making funny faces.
If you like the Muppets and Animal then you should check out this The Muppets Animal iPhone 4s / 4 Case.