Slash describes the development of the music of "Welcome to the Jungle" in his self-titled autobiography. As the band was trying to write new material, Axl remembered a riff Slash had played while he was living in the basement of Slash's mother's house. He played it and the band quickly laid down the foundations for the song, as Slash continued coming up with new guitar parts for it. He credits Duff McKagan as coming up with the breakdown. Duff contradicts this in his autobiography, "It's So Easy (and other Lies)",