Wow I'd bet catnip works pretty well for my 2 year old daughter who loves using keyboard short cuts I don't even know how she got to. Problem is it perpetually says that it is starting but never starts in 10.8.3.
I went searching for this answer because my kitten decided to do the same thing. I've also come home to Facebook and various forms of metal playing at full volume... you'd think she was a teenager.