A lot of you might have heard of this already.
I learned of it a few months ago.

The Dark Side of OZ!

That is when you play the movie The Wizard of OZ and at the same time play Pink Floyd's Dark Side of the Moon album.
You must have your CD cued up and set to PAUSE then start the movie.
When the MGM Lion roars on it's third roar you hit the play button on the CD player. You must set your CD player to REPEAT the CD so it will keep playing through out the movie.

Here is a link to help you set it up.
It also shows you screen shots of what happens during the movie while in sync with the CD.

Link: http://www.everwonder.com/david/wizardofoz/

It is pretty neat.
You can also find this on YouTube in 15 parts but, I rather watch it on the big screen.
Using the surround sound speakers and all that jazz...