- Actor-Inspired Element: The spirulina and almond butter mixture Sheldon puts on his soy hot dog was actually concocted by Edward Norton in his hotel room.
- Billing Displacement: Robin Williams had top billing over Edward Norton, the latter of whom has more screentime than Williams.
- Box Office Bomb: It grossed $8,382,938 during its theatrical release, barely a sixth of its $50 million budget. Danny DeVito starts his DVD Commentary with "I guess the mourning period is over."
- Creator Killer:
- The film killed writer Adam Resnick's cinematic career completely after several failed screenplays previously. Resnick has only worked in TV since.
- Danny DeVito only directed one more film after this, the Ben Stiller comedy Duplex, which also flopped. Fortunately he'd rebound on It's Always Sunny in Philadelphia.
- Old Shame: Jon Stewart brings his work in the film up a lot as Self-Deprecation, often to contrast his resume with the work of a much more successful actor.
- Playing Against Type: Harvey Fierstein, known for playing Camp Gay characters, plays a gangster.
- What Could Have Been:
- Jim Carrey was attached to star at one point but eventually dropped out to do The Majestic.
- Hank Azaria was originally cast as Marion Frank Stokes, but dropped out due commitments to America's Sweethearts.
- Among the auditionees for the part of Spinner, the brain-damaged boxer, was Henry Rollins. Rollins tells the story of his audition here.
- Writer Adam Resnick wrote a small cameo bit by Steve Burns, where Sheldon would see Steve in a bar, ask how it was going and Steve would just shake his head. DeVito cut it because he felt that most viewers wouldn't get the reference. Funnily enough, this film released shortly before Steve left his show, adding another layer to said bit.
- In the original script, the Smoochy costume was orange.
Trivia / Death to Smoochy