Sleep

Jerusalem was a bootleg release of the legendary Sleep cut that got them kicked off London Records back in 1993, when the label asked them for a single and they produced this 68-minute dirge epic. Broken up into six tracks, nerve-rackingly repetitive (in the best way) and, of course, mind-squashingly heavy, Jerusalem is simply one of the most important records in all heavydom. Sleep bassist and singer Al Cisneros has said in interviews that he still prefers this version to the "sanctioned" one that came out on Tee Pee in 2003, titled Dopesmoker.