Heh. I remember programming a simple startup file in DOS that made a "formatting drive C:" thing on boot that had a 2-shade progress bar to make it look authentic. It was in a computer class as a joke. One teacher liked it when I showed it to him and he told me to leave it on for the next class. The next teacher in the room wasn't impressed.
Of course, I didn't prevent it from being disabled by QBasic's Ctrl-Break keys.
