A brutal, savage, and plodding ( in a good sense) riff- more savage than you'd think a song that's- essentially- about smoking pot would be, and one of the classic Black Sabbath riffs. The opening song on "Master of Reality," their third album in 1971.Later ripped off a little bit by the Red Hot Chili Peppers during one part of one of their best known numbers:"Give it Away."
