Trivia: During the flight to Japan, Marge reminds Homer that he had seen the Japanese movie "Rashomon" and had liked it, to which he responds something like "I don't remember it like that". This is a reference to that very movie, in which a number of people witnessed a murder and each gave a very different version of the events after what each "remembered".
Trivia: After Skinner tells the students to report to the "Butthead Auditorium", he says to himself that they "shouldn't have let the students name that." This is a reference to a School from Maryland about 10 years ago that let the students rename their school. Their top pick, "Springfield Elementary", was rejected because of the negative influence of Bart and the show itself.
Trivia: Towards the end, Mr. Burns starts becoming insane, growing long hair and long, claw-like fingernails and toenails, and becoming obsessed with germs. This just what happened to Howard Hughes, the eccentric billionaire who died in 1976. Burns also has a plane called the "Spruce Moose." Hughes' plane was the "Spruce Goose," currently displayed in Long Beach, California.Krista
Trivia: At the end of this episode, Homer has a barbecue with a banner that reads "Homer's 305th 'Everything is Back To Normal' Barbecue", even though this is the 306th episode. This is because everything was not back to normal at the end of Who Shot Mr Burns? Part 1, the only Simpsons cliffhanger.
Trivia: In the segment Homer3, you can see at one point in the background of the 3-D world a tea kettle. This is a reference by the animators to the first object ever digitally animated into 3-D, a kettle. You can also see the number 733, which if you look on a normal phone it spells out PDF, the software they used to make the sequence. There's a special on these on the 7th season DVD's.
Trivia: When Homer starts tripping on the chili pepper, he sees a distorted vision of Ms. Crabapple and she makes "wah-wah-wah" noises when she talks. These are the same noises teachers are always making in Charlie Brown cartoons.Krista
Trivia: There is a scene from Kent Brockman's report on the dolphins that was cut out in syndication. After the dolphins warn him not to mention their attacks, he "corrects" himself with him saying "Killer Dolphins" and says "Killer Italians" (and features a photo of Luigi the chef).
Trivia: During the opening graveyard scene, notice the gravestone which says Paul McCartney. Creator Matt Groening is a big fan of the Beatles, and during the 1960's, a conspiracy theory was being spread that Paul McCartney had been killed in a car crash and was replaced by a lookalike.
Trivia: The cookbook which says 'How to cook for forty Humans' parodies a 'Twilight Zone' episode called 'To Serve Man.'Hamster