Building on the rapping style of eccentrics Kool Keith and Del tha Funkee Homosapien, Def Jux headliner Aesop Rock became one of the hottest MCs in the post-millennial underground. After a pair of self-released LPs (Appleseed, Music for Earthworms), he recorded Float for Mush in 2000. The former Ian Bavitz then issued a pair of singles — Coma and Boom Box — for another underground rap label paragon, Definitive Jux. His second full-length, 2001s Labor Days, earned positive reviews and featured production from El-P and Blockhead. The Daylight EP kept his name in the papers, and his Def Jux follow-up, Bazooka Tooth, was released in September 2003. A seven-track EP, Fast Cars, Danger, Fire and Knives, followed in early 2005. In early 2007 Aesop Rock composed a 45-minute piece for Nikes Original Run series, a continuous track meant to be listened to while jogging (other artists included LCD Soundsystem and the Crystal Method), and by September his much-anticipated full-length, None Shall Pass, which included guest appearances from El-P and John Darnielle (from the Mountain Goats), came out.