Are you looking to be driven slowly insane? Then check out William Basinski's Disintigration Loops. This dude came upon a bunch of old tapes containing random loops. Strangely, the tape had begun disintigrating (hence the name, Disintigration Loops!), and causing strange things to happen to the sound. It's literally the same loops over and over again, occasionally interupted by the sound cutting in and out where the tapes had gone bad. Very strange.