This eight minute harmonica-accented heavy Blues tune reflects the influence of producer Rick Rubin. The knob-twiddling legend made the band listen to their self-titled debut album before recording 13. Ozzy Osbourne recalled to Spin magazine: "I remember going to [Rubin's] house, and he was going on about the first album. I was like, 'What the f--k's the deal, man? Why the first album? We've all done a billion albums since then.' He goes, 'You're not a heavy metal band. The first one was a blues album.' And I go, 'Yeah.' And he goes, 't hat's what I'm looking for.' I said, 'A blues album?! You want us to do a blues album?' I didn't know what the f--k he was on about. I thought he was fu--ing nuts. But I got the fu--ing punch line three weeks later. It wasn't that he wanted a blues album so much as he wanted the blues feel from us."