My brother told me of something that happened at his school assembly once. The Headmaster was having a jolly good rant, and said about something-or-other (I forget what) "This is madness!" At this, the entire fourth year, as one, followed through with "One Step Beyond!" and started doing the appropriate dance (Dur dur durrrr, dur de dur dur durrrr).

I believe this was the only time an entire year got detention.