Cobain apparently lifted it from a 1984 song by U.K. artwork-steel band Killing Joke, who Dave Grohl compensated back again 12 years later on by drumming on their 2003 album. In the wake of Cobain’s suicide, however, by far the most haunting lyric would turn out to be, “And that i swear that I don’t Use a gun.”When Pharrell Williams volunte