The film, like any Cheech and Chong movie, is loosely scripted and tightly storyboarded, with the physical characteristics of each sequence carefully pre-planned, a technique which evolved from their origins in improvisational theatre. Chong says: "We rely on the storyboards to keep the plot flowing". Whilst Cheech said: "And to tell the cast and crew where to report in the morning". Chong points out: "Improv has its own disciplines. When it works, it's as if you had tapped in to some crazy force. There's a spontaneity that's funnier than anything an all-night story conference could produce". And when it doesn't work? Chong says: "You look at the rushes, say -------------, we blew that one, and re-shoot. We probably use . . . and waste . . . more raw film than anyone in the business. But on the basis that comedy is the art of the unexpected, it's worth it".