Quoted from Darkwing:

I was playing Tron when about 45 seconds in the cabinet starts shaking a bit and I hear a loud meoooooow... Powered it off in a hurry and opened the door and out pops my Siamese, who amazingly didn't seem to get electrocuted! I swear I had only opened it and turned my back for a second... Lesson learned, you gotta watch cats + pinball machines like kids + water...

Quoted from Coyote:

Yeah, I often do. (Which is probably good in this case.. if I had closed it and THEN started a game while she was in there... no telling what would happen.)

Quoted from HFK:

I've never had a problem with mine. You just have to make sure your cat(s) have activities. Both of mine have a cat tree and scratching posts plus more little mice/toys then I ever had as a kid. They have never touched a couch or chair or anything. As long as they have things that are their own, a clean box, and proper vet care they are smart little guys.