My dad had a barn cat that would do that, but out of all the cats he had out there Butthole was the only one. Yes, that was his name -- Butthole -- because he was one! LolYears ago I had a cat that would sleep like that, on his back with his feet all splayed out. I’ve never seen another one that did; they might pause for a moment while rolling over, but this cat would just completely rack out on his back.