What interesting things has your cat destroyed

I don't have any cats anyore becasue my husband doesn't like cats; but before we got married, I have had cats pretty much all of my life. I dont' think that I had a cat that was really destructive, although they did accidently knock things over and such as that.
My daughter had two cats, named Tweedle Dee and Tweedle Dum. They looked exactly alike and she was the only one who could tell them apart, and I still don'tknow how she did it.
One weekend she was down visiting me, kitty cats and all (of course), and I was knitting as we were sitting on the couch and visiting. All of a sudden Tweedle Dee (or perhaps Tweedle Dum, who knows? ) pounced on my ball of yarn and had chased it halfway across the room before we could stop her, tangling that yarn all over everything.
I had to gather it up and untangle it, and the next time she came close to the ball of yarn, I thimped her on the nose with my knitting needle !
Needless to say, my daughter was very upset, and you would have thought I did something terrible to that cat.
However, after that she didn't pounce on my ball of yarn anymore....