alright aaron, I wasn't going to throw my two cents in, but since it appears this thread is gaining steam, I figured some real metal ought to be represented (not that I don't adore dream theater).
the below clip is a short film entitled 'the separation' that someone used to feature 'jambi' by tool. although the film is unrelated to the song or band, it works quite well, even if it is a little too on the nose. the song is more of a metaphor, but it makes for a moving piece nonetheless.
http://m.youtube.com/watch?v=LNGPAMbpp10
I know the concept is rather dark, but it's nothing offensive or obscene.