>>> But indoor cats are mentally disturbed (wouldn't you be locked up all the time?) so there could be something to it.
Never thought of it that way, but I definitely agree!
El Destructio Kitty brings to mind a fond memory of my Granddad when I was about seven years old. One summer day, my Granddad, my Dad, my older brother and myself were walking in the north woods of Minnesota, near the Boundary Waters Canoe Area where our cabin is. We came upon a huge boulder, perhaps 7-8ft high, perched atop a rock outcrop. Granddad looked at the boulder, and then at my Dad and brother. I was clueless. Without saying a word they seemed to have melded minds as the almost instinctively began to lever the boulder off its position and send it rolling down the hill. I have to say, it was quite a spectacle, and not just for a seven year old!