In case you haven't heard: cats are jerks. And what's the first phase in a cat's campaign of terror? Why, pushing all of your belongings off of flat surfaces, of course.
Some people might say that is just how a cat "plays" with you, that he's just being "friendly." Those people haven't looked into the eyes of a cold-blooded feline as he slaps your new cell phone off the kitchen counter. "Maybe he's just testing the phones durability? Or maybe he is in the middle of an important experiment on the laws of gravity?"
Wrong. The next thing you know, he's on a vicious new offensive against your ankles.