This is very neat to listen to. I guess these were posted during the time NIN was working on the Fragile and posted these as teasers to their old website. Click on the numbers to hear the loops. Each number adds another layer to the sound or changes the ordering of the mix. There are other loops for other songs too, but this one was really neat. Check out the rest at the NIN Hotline Archive. They are the colored boxes under Sound Loops.