There was also a program around on the C64 that made the stepmotor of the floppydrive play music by stepping it insanely fast, it usually broke the drive after an hour or so
I remember that one. It played 'Daisy' on the drive as I recall. I used it once and didn't have any problems, but I heard about other people who had their drives wreaked by it. I hope modern drives aren't susceptible to that kind of hacking.