Iggy Pop spent a good deal of time in the studio during the sessions, stating "I worked extensively on that album. There's a lot more work there than is reflected in just the simple co-writing credit for two songs and some of the old stuff." Discussing the collaboration, Bowie said: "We worked very much the way we did on "Lust for Life" and "The Idiot". I often gave him a few anchor images that I wanted him to play off and he would take them away and start free-associating and I would then put that together in a way I could sing." Their collaborations resulted in "Tumble and Twirl" and "Dancing with the Big Boys", the latter of which was written and recorded in eight hours as they egged each other on. In what was described as an "exhilarating rush", Bowie and Pop "went in the studio with a few bottles of beer and would virtually bellow out anything that came into their heads," said Padgham. "And I just recorded it all." According to Padgham, the two wrote many songs that didn't make the final record. He described these tracks as "more left-field" and "less poppy".