I'm a big mash-up and remix fan. Always have been. I recently dug through a bunch of old mash-ups and remixes I have sitting on my computer (many from the 2001-2002, aka the Eminem era). One of the best ones was by the then-not-as-popular-as-he-is-now Jacknife Lee. This track is so rare that it's not even listed as an official release on his discogs.com page. So there.
It's a remix of Eminem's "Cleaning Out My Closet", and wow. It's intense. He reworks the slow and, frankly, weak track into a fury of guitars, drums, and electronics. It's the tits.