I'm sure that most of you have heard of the allegedly synchronicity between Pink Floyd's album Dark Side of the Moon and the movie The Wizard of Oz. If not, the Wikipedia entry Dark Side of the Rainbow explains a bit further.

Someone has taken the trouble to create The Wizard of Floyd, a Google Video of the entire movie with a Pink Floyd soundtrack. You should probably have The "Definitive List" of synchronous instances handy to see the allegedly significant moments, if you're up to the challenge...