* AFIS100YearsSeries:
** AFIS100Years100Laughs: #36
** AFIS100Years100MovieQuotes:
*** #82, "Toga! Toga!"
* CareerResurrection: For Music/ElmerBernstein, whose career was mostly spent scoring TV shows in the 1970's (a far cry from ''Film/TheTenCommandments'' and ''Film/TheMagnificentSeven''). His work on the film later made him a go-to composer for many popular comedies (such as ''Film/{{Airplane}}'', ''Film/{{Stripes}}'' and ''Film/{{Ghostbusters|1984}}'') and he became Creator/JohnLandis's AssociatedComposer.
** In fact, Landis actually knew Bernstein when he was a kid, and had actually gone to school with his son, Peter.
* BreakthroughHit: For Creator/JohnLandis.
* TheDanza: Creator/JohnBelushi as John "Bluto" Blutarsky.
** Subverted, however, with John Vernon's character Dean Vernon Wormer. According to Creator/JohnLandis, his first choice for the role was Jack Webb of ''Franchise/{{Dragnet}}'' fame, who turned it down because he felt that the film was making fun of his straight-laced, law-and-order image.
*** Doubly subverted with John Vernon, as Vernon was actually one of his ''middle'' names. He was born Adolphus Raymondus Vernon Agopsowicz.
* DawsonCasting: Most of the cast. For example, Mark Metcalf (Neidermeyer) was 32. One of the other most notable examples was 19-year-old (at the time of production) actress Sarah Holcomb, who played 13-year-old statutory rape victim Clorette [=DePasto=]. Justified in the case of Bluto. ("Seven years of college down the drain!") and subverted by the casting of Creator/KevinBacon, who was actually of college age at the time, and even then he was still an example because he was 20 while his character was a freshman.
* {{Defictionalization}}: [=DeWayne=] Jessie, the actor who played Otis Day, changed his name and recorded with the Knights.
** For a while in the 80s, if you asked for Babs at Universal Studios Hollywood, [[http://legendsrevealed.com/entertainment/2013/02/19/did-universal-studios-used-to-offer-an-incentive-based-on-a-joke-from-animal-house/ you'd get some sort of incentive]]; it apparently depended on whoever was running the tour that day. Sadly, Universal announced they would no longer honor it in 1989.
* DeletedRole: Sunny Johnson is listed in the credits as "Otter's Co-Ed". She does not appear in the movie, however, as her scene was cut.
* DeletedScene: A scene that was cut was Pinto being entertained by Boon and Hoover by telling tales of legendary Delta House frat brothers from years before. The past fraternity brothers had names like Tarantula, Bulldozer, Giraffe, and his girlfriend, Gross Kay.
* EnforcedMethodActing:
** When not filming, Creator/JohnLandis purposely prevented the actors playing Deltas from interacting with the actors playing Omegas so that the "enemies" wouldn't end up bonding with each other (the Delta actors were even brought to the set a few weeks earlier than the Omegas to achieve this).
** As a mark of the success of Landis' plan, Bruce [=McGill=], who played D-Day, had the piano at the hotel accommodating the cast moved to his room and held late night parties with the other Delta actors; Mark Metcalf, who played Niedermeyer, had his room changed to the one above [=McGill's=] so that the noise and resulting sleep loss would keep him in a bad mood for filming.
** When Bluto takes Charming Guy's guitar and smashes it, the scene was completely improvised from the script. The terrified reaction from the actors is genuine.
* ExecutiveMeddling: Various. Universal President Ned Tanen insisted the Road Trip sequence be cut because he worried it could start race riots. Landis showed the clip to Creator/RichardPryor, who wrote to the executive "Ned, Animal House is fucking funny and white people are crazy - Richard."
* HarpoDoesSomethingFunny: Several of the scenes with Bluto, such as the part where he piles on food and when he smashes the guitar, were improvised by Creator/JohnBelushi.
* ItWillNeverCatchOn: Creator/DonaldSutherland was offered either a percentage of the gross, or cash up front. He chose cash, sure that the film would flop. If he had taken the former option, he would've raked in several million dollars.
* MissingTrailerScene: A scene featuring Otter driving a girl (played by location scout Katherine Wilson) to the Rainbow Motel on Old Mill Road is seen briefly in the original trailer but was deleted from the film.
* MoneyDearBoy: Creator/DonaldSutherland was so convinced of the movie's lack of potential, that, when offered a percent of the gross or a flat fee of $75,000 for his three days' work, he took the upfront payment. Had he taken the gross percentage he would have been worth an additional $3-4 million.
* RealLifeRelative: Creator/JohnBelushi's wife, Judy Jacklin (now Judith Belushi-Pisano), is an uncredited extra in several toga party scenes.
** The female clerk from whom Flounder buys the marbles is actually Stephen Furst's wife.
* TheRedStapler: Originally popular during the late Fifties and early Sixties, fraternity "toga parties" became a huge fad all over again at colleges across America following the release of this film.
* StillbornFranchise: A sequel was planned that would take place during the 1969 Summer of Love and involve the Deltas reuniting for Otter's wedding. But when ''Film/MoreAmericanGraffiti'' bombed at the box-office, Universal stalled the project. The project was scrapped for good when Creator/JohnBelushi died in 1982.
* ThrowItIn: When Bluto is sneaking around the campus at night and slips, rolls around and casually stands back up, that was an actual slip-up by Creator/JohnBelushi from the very wet grass on the location. Creator/JohnLandis thought it was the funniest take and used it.
** Verna Bloom said that her scene with Dean Wormer, where she is drunk and he is on the phone with the Mayor, was completely improvised because Landis was unhappy with the dialogue written into the script.
* WhatCouldHaveBeen:
** Creator/ChevyChase was originally asked to play the role of Eric "Otter" Stratton. He turned it down in order to star in ''Film/FoulPlay''. Creator/JohnLandis preferred to cast unknown actors instead of comedians and takes credit for subtly discouraging Chase by describing the film as an "ensemble".
** Creator/BillMurray and Creator/DanAykroyd were also pursued for the roles of Boon and D-Day, respectively, but they were busy with ''Series/SaturdayNightLive''. In fact, the role of D-Day was based on Aykroyd.
** Creator/BrianDoyleMurray was the original choice for Hoover.
** If Creator/JohnBelushi turned down the role of Bluto, the next choice would've been Music/MeatLoaf.
** As mentioned above, the first choice for the role of Dean Wormer was Jack Webb, while the first choice for the role of Mrs. Wormer was Kim Novak.
** Belushi wanted his character to go with the others on the road trip but Landis refused, arguing that his character was best used sparingly.
** Creator/HaroldRamis wrote the part of Boon for himself to play, but Landis felt Ramis was too old. Ramis was so disappointed that he refused to accept a smaller part Landis offered him. (Ramis was 32, Peter Riegert was 29).
** Originally, Ramis and Doug Kenney's idea was titled ''Laser Orgy Girls'', a comedy about CharlesManson as a high school student. Producer Matty Simmons suggested that the setting be changed to college and the content to be toned down. Ramis also incorporated ideas from an earlier treatment he wrote titled ''Freshman Year'' based on his experiences in college.
** The original script called for Flounder to be admitted to the fraternity only if he told one of Larry Kroger's secrets. Flounder blurted out, "He's got spots on his weenie!" Later, during the naming of the pledges, when Larry asks why his Delta name is Pinto, the entire fraternity drunkenly yells, "'Cause you got a spotted dong!"
** In the original script, Flounder and Sissy fall asleep during the toga party--another sign that Flounder wasn't cool. (The scene was apparently never shot, but one publicity still photo shows them snoozing on a couch.)
** The original script included a scene of "competitive projectile vomiting" which Flounder was to fail at repeatedly. Later, after Flounder throws up "on" Dean Wormer, Boon congratulates Flounder on his technique.
** One bit that was written in the original script but never filmed included a parade bust that was destroyed at the climax of the film. The bust was of ''JohnFKennedy'' and the gag was Kennedy's head was punctured in the same way the real Kennedy would be shot the next year. Landis cut the idea because he felt the tone of the gag was wrong.
* WriteWhatYouKnow:
** Creator/HaroldRamis, who co-wrote the film, based some of the pranks on his college experiences at Washington University in St. Louis, specifically when Otter and Boon are hitting golf balls at the ROTC.
** The film was inspired by co-writer Chris Miller's short stories in National Lampoon, drawn from his experiences in the Alpha Delta Phi fraternity at Dartmouth (where he graduated in 1962). "Animal House" was the fraternity's real-life campus nickname, earned after an upperclass member shot a chicken from a second-floor window as some fellow Adelphians chased it with intent to kill and eat it.
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