For the purposes of this activity:
Synchronicity is the match formed by synchronizing a movie with an unrelated music album, to produce a new experience unintended by either work.

basically you watch a film (but turn the sound completely down) while listening to a album.
the lyrics,music,mood etc of the music then ties in with what you are seeing on screen - try these syncs...

Batman vs Radiohead
http://www.synchronicityarkive.com/display.php?view=335

Batman vs Radiohead Returns
http://www.synchronicityarkive.com/display.php?view=336

The Batman Bulletin
http://www.synchronicityarkive.com/display.php?view=439