O Holy Night...
If you're online and active in singer circles, you've probably already heard the "best" version of O Holy Night. I can't find it credited anywhere but sweet Jesus it brings tears to my eyes. Oh and remember to be brave....the best stuff is right towards the end.
Edit: I'm also told that this is rather amusing. Even if you don't know anything about how organists should behave, you should be amused. Hallelujah indeed.