We took in two cats over the past couple years, and they both sleep in odd contorted positions. Our white cat practically twists her head around like her neck is broken, then wraps her arms around it all. Our black cat (who is currently quite overweight, but always hungry nonetheless) sleeps somewhat similar to the cat in the photo - belly up. It's freaked me out on numerous occasions to the point where I had to walk up and poke her a few times to make sure she is still alive. When she sleeps it looks like she croaked or something. If I so much as fall asleep on the couch with my head tipped to the side, I will have a nech ache all day - I don't know how they do it.