Tumbleweed - a structural part of the above-ground anatomy of a number of species of plants, a diaspore that, once it is mature and dry, detaches from its root or stem, and tumbles away in the wind. (wikipedia)

Tangleweed - a non-structural part of the anatomy of Tangles the cat, that once shed, tumbles around the house.

Tangleread - a bookmark in the shape of Tangles the cat.

Our cat just falls over like this and falls asleep. He will do it just about anywhere.