One of my cats batted my Apple optical mouse around the desk until it flipped over.. The laser must have dazzled him, because he got all po'd at it and tore the crap out of it. I was really amused until I thought about having to replace it... oh well. I use a trackball now. He and his brother were put up for adoption when we moved to St Louis.. I don't think I remembered to warn the friend who took them in that he might want to tuck his mouse away when he leaves the house.