* AdamWesting: ''Full Metal Jacket'' is the [[{{expy}} source]] of most subsequent RLeeErmey's roles. Ermey is playing himself, [[ActorSharedBackground given his past as a Marine Drill Instructor]].
* CastTheExpert: RLeeErmey was originally just a technician on the film, there to make a couple of films to advise the actor playing the DrillSergeantNasty on how it should be done. Then Kubrick saw his tapes... said tapes were of Ermey performing his DrillSergeantNasty speeches while being constantly pelted with rotten oranges for fifteen minutes. He never stopped, flubbed, or repeated himself throughout the whole thing.
* CompletelyDifferentTitle: While a few countries went for variations for "metal jacket", in South America (plus Portugal) went for the poster, translating Joker's "Born To Kill". Central America went for yet another scene, ''Cara de guerra'', "War face".
* DubNameChange: The German dub changed Private Pyle's nickname to "Private Paula", replacing the insult of being an incompetent Marine (as Gomer Pyle was on ''Series/TheAndyGriffithShow'') with one of being a woman. "Private Snowball" became "Private Scheewittchen", which means "Private Literature/SnowWhite," keeping the IronicNickname [[{{Woolseyism}} and adding the additional insult of being like a fairy princess]].
* DyeingForYourArt: Vincent D'Onofrio gained so much weight for his role as Pvt. Gomer Pyle, that he tore ligaments in his knees during the obstacle course scene. He surpassed Robert [=DeNiro=]'s record (for ''RagingBull'') for most weight gained for a role, over 70 pounds.
* EnforcedMethodActing: To make the recruits' reactions to Gunnery Sgt. Hartman as realistic as possible, Stanley Kubrick made sure that R. Lee Ermey did not socialize with the actors playing recruits. They also didn't get to meet him prior to filming.
* FakeAmerican: The gung-ho Colonel who asks Joker why does he wear a helmet that says "Born to Kill" and a peace sign is played by Canadian actor Bruce Boa.
* FakeNationality: The actress who played the Vietnamese hooker is actually of Chinese and French descent. Arguably averted -- a mixed-race ethnic Chinese and French bastard could easily have been found in 1960s Vietnam, and would have been a likely candidate for the sex trade in that time and place.
* HeyItsThatGuy:
** Animal Mother is just like [[Series/{{Firefly}} Jayne Cobb]], except with a desire to save others. He was also a [[ThePatriot Royal loyalist]] during UsefulNotes/TheAmericanRevolution. That, and he was an [[IndependenceDay Air Force officer]] when aliens invaded Earth.
** On the other hand, [[Series/LawAndOrderCriminalIntent Bobby Goren]] has never snapped as bad as Gomer Pyle, thank God.
** Before becoming Film/JamesBond's CIA contact, [[Film/TheLivingDaylights Felix Leiter]] was a Marine journalism officer. (alternate: Who knew [[Series/{{Lost}} Christian Shephard]] served in Vietnam?)
* HeyItsThatVoice: After [[spoiler: being killed by Private Pyle]] Gunny Hartman [[spoiler: was aptly reincarnated]] as a [[WesternAnimation/ToyStory toy army man]].
* NamesTheSame: '''Joker''' has no connection to [[FistOfTheNorthStar Shin's chief lackey]] or [[SelfDemonstrating/TheJoker the Clown Prince of Crime,]] or [[Franchise/MassEffect the pilot of the ''Normandy'' for that matter.]]
* RealLifeRelative: Stanley Kubrick's daughter Vivienne Kubrick composed the original music, under the pseudonym Abigail Mead (adapated from the name of the family home, Abbot's Mead).
* {{Sampling}}: The rap group 2 Live Crew sampled the infamous [[{{AsianHookerStereotype}} "Oh me so horny/Me love you long time"]] lines for their hit single "Me So Horny."
* ThrowItIn: Many of RLeeErmey's lines as Hartman were ad-libbed. He was one of the few actors allowed to go OffTheRails in Kubrick's films, who is known for his meticulous control of every part of the story. When filming the scene where [=GySgt=] Hartman is berating new recruits, the "reach-around" comment was tossed in by Ermey, and not originally in the script. Kubrick stopped the filming to ask what that meant. After it was explained, he laughed, and decided to include it in the final film.
** Ermey is also a notable subversion. Kubrick disliked improvisation as it usually played hell with his shooting schedules. Ermey, in a major role for the first time and eager to impress, spent so much time with the dialogue coach that he was able to finish his scripted material in very few takes, allowing him the time necessary to throw in his own flourishes --all added to the shooting script and delivered ''verbatim''-- with Kubrick's blessing.
* WhatCouldHaveBeen:
** Creator/ArnoldSchwarzenegger was considered for the role of Animal Mother.
** Creator/BruceWillis was offered a role, but turned it down due to scheduling conflicts.
** The door gunner would've been Hartman, had R. Lee Ermey not been singled out by Kubrick after seeing his handiwork.
** William Hope was also offered a role. He turned it down in favor of ''Film/{{Aliens}}''.
** Bill [=McKinney=] was supposed to play Hartman, but Kubrick refused to meet with him [[IAmNotSpock because he was so scared by his performance as the mountain man]] from ''Film/{{Deliverance}}''.

----