Flood, known for engineering and producing U2 and Depeche Mode albums, was employed as co-producer on "The Downward Spiral". It became his last collaboration with Nine Inch Nails due to creative differences. A "very dangerously self-destructive," humorous short song written for the album, "Just Do It", was not included in the final version and criticized by Flood in that Reznor had "gone too far." Reznor completed the last song written for the album, "Big Man with a Gun", in late 1993. After the album's recording, Reznor moved out and the house was demolished shortly thereafter. "The Downward Spiral" entered its mixing and mastering processes, done at Record Plant Studios and A&M Studios with Alan Moulder, who subsequently took on more extensive production duties for future album releases.