At just under seven minutes, "Turn Blue", the longest song on the album, was a sprawling confessional that dated back to an abortive recording session by Bowie and Pop in May 1975, when the latter was in the depths of his drug addiction. Originally titled "Moving On", it was composed by Bowie, Pop, Walter Lacey, and Warren Peace. It was the only set of lyrics that did not appear on the original vinyl record sleeve. The album's remaining tracks included "Sixteen", the only piece written entirely by Iggy Pop, "Some Weird Sin", a hard rock number featuring a "lost-boy lyric", the "neo-punk" "Neighborhood Threat", and "Fall in Love with Me", which grew from an impromptu jam by the band to which Pop composed lyrics apparently evoking his then-girlfriend Esther Friedmann.