Clical music qu. can you please tell me what this is?

It seems to be a remix of a clical piece i've heard before, i don't want to know the remix (though that'd be cool too), but the original. The video accompanying it is not relevant, but opens with the song, and then at the 3:05 mark it kicks back in, could perhaps even be two separate songs. Good luck and thank you. a href="http://video.google.ca/videoplay?docid=1457385699819054624&ei=qHjYSZPNKaL2qAPOiu3-BQ&q=conspiracy&hl=en&dur=2" rel="nofollow"http://video.google.ca/videoplay?docid=1…/a