I'm amazed at how many shapes a cat can get into. They're kinda like a slinky. They can be all compact one minute and stretched out the next.
My favorite cat pose is one that I call "fuzzy lump". My cat Jingle can usually be found laying around like this outside of my bedroom most mornings, no limbs to be seen. Just a gray fuzzy lump of a cat body. Sometimes she even curls her tail around her feet to make herself more of a lump. And she almost always looks supremely happy when laying around like this.