There was no official script, apart from several pages outlining main dialog sequences. Much of the action/dialog was improvised and ad-libbed by the cast and crew as they went along. This caused many problems for the editor, Warner E. Leighton, who never knew what footage was being dumped on him or where in the film it belonged. In the DVD audio commentary, he described the script for the construction site scenes of the main pursuit as a piece of cardboard with a circle on it. Halicki pointed at it and said, "That's the dust bowl. We went around it twice. There's your script."