At my last high school, I was the student given the job of ringing the school bell. I set an alarm to go off that gave me enough time to get to the office with all the buttons in it for said bell. So I had an excuse to leave every single class a few minutes early. The bell actually had a button for each room, and one for "all rooms". One day I sat their individually toggling each room button, so that the bell sounded like it was moving slowly down the hallways. Alas there was only the one frequency, or music student that I was would have written a song to play on it.