This is Waldo, the Kitten, Sleeping on a Bookshelf.

This kitty slept between books!  It's an adorable cat, isn't it? It had slept there for an hour!
It's hard to sleep on physical stance, I think. That's why this kitty hang down its head and blood go up head. But one time, I did on physical stance like this... When I go home after part time job, I sat on chair. I got pain in the small of my back.So, I want to stretch it. I straight my legs and lean forward. I was so tired to sleep keep that stance...I was very surprised when I got up! I couldn't believe it. Of course, I couldn't relax that day:-(