Trivia: Part of the film was actually shot at the infamous Cabrini-Green housing projects. The crew had to pay off members of local street-gangs in order to maintain a peaceful shoot. (Although allegedly, one bullet was fired at a production vehicle during photography).
Trivia: Because Robin Williams ad-libbed or improvised so many of his lines, the film was ruled ineligible for the Adapted Screenplay category at the Academy Awards.
Trivia: Ash's car has appeared in most of Sam Raimi's movies. Look out for it in Spider-Man and Darkman.
Trivia: Reportedly, Disney chairman Jeffrey Katzenberg repeatedly tried to sabotage the film's production as he was worried it would overshadow their film "Aladdin," especially as both films featured Robin Williams as a prominent character. Williams was furious, as he felt the film's environmental message was important and that there was no reason he couldn't do both films. It's believed this may have been a factor in William's feud with Disney that lasted several years after "Aladdin" was released.
Trivia: Director Peter Jackson makes a cameo appearance as the Mortuary Director's Assistant when Lionel's mom is being filled with embalming fluid. Whilst the fluid gushes out of Mum, Jackson grabs the sandwich he left beside the corpse and takes a bite. Doesn't he look odd without his beard?
Trivia: At the end of the film when Scrooge is going round being nice to everyone, as he's on his way to the Cratchit's house, we see in the background a shop called "Micklewhite's". This is Michael Caine's real surname. (01:20:55)
Trivia: The Ark of the Covenant from Raiders of the Lost Ark (1981) can be seen in the same warehouse where the shrinking machine is being stored.
Trivia: When Joey's television set is flipping through the channels all by itself, on one of the channels is an interview with Tony Hickox, the director of the film.
Trivia: When Roy is flipping through the channels while he is in the TV, he flips over the couch. Two girls come in and ask, "Where have you been?" Roy screams at the panning camera and leaves. That show was Three's Company, which made John Ritter famous.
Trivia: Dale Cooper's role was originally larger than it appeared in the final film. Kyle MacLachlan had originally declined to appear, for fear of being typecast. To compensate, his role was downgraded to a minor cameo, and a new character was created to fill the role of lead investigator.