It always makes the Phactor feel good to see that other people study things of little apparent utility for the sheer joy of finding things out, like studying the physics of cats. Utility is much overrated. If only the calculus lobe of my brain had not failed to develop, physics would have been a lot of fun. And while having no doubt at all that cats obeyed, and here this term is used not in a manner to insult them, the laws of physics, it's still fun to figure out how they manage to do what they do. Of course to study the physics of cats, you first have to get them to do something physical!