Similar to (and, in my opinion, much cooler than) Dark Side of the Rainbow, this concerns synching the Pink Floyd song Echoes, off of the album Meddle, to the last section of the movie 2001, subtitled "Jupiter and Beyond the Infinite." Pause the movie just as this title appears, play the song, and about 1 second after the first "ping", unpause the movie. Then sit back and enjoy. Unlike DSotR, the synchronicities in this are more thematic than lyrical.