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* NoNameGiven: The young cop in Lethal Weapon 3, who's always being mocked for his age [[spoiler:and ends up getting killed by Jack Travis]] is never given a name. In spite of his significant supporting role, even the credits just call him "Young Cop".
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** A more comedic example would be in the fourth film when Riggs wants to ask the psychiatrist for legitimate advice regarding his intent to marry Lorna, but his years of mocking her makes her instantly go on the defensive and assume he's trying to punk her again.
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* MakeItLookLikeAnAccident: Parodied in the third film. After Riggs and Murtaugh are busted down to patrolmen, they catch a guy jaywalking; when they say they're gonna cite him for it, the jaywalker is apoplectic. "You've got people actually committing crimes in this city, and you're busting me for crossing the street?" Eventually, he gets on Riggs' nerves to the point where he's about to pull his gun on him. "Lemme shoot him, Roger! We can make it look like suicide!" After the jaywalker takes off on Roger's advice ("Get out of here before my partner kills you! No, not ''that'' way, the ''other'' way!"), Riggs and Murtaugh both laugh their asses off-- they were only having a little fun with the guy, apparently.
** But played painfully straight in the second film when Vorstedt reveals that Riggs' wife's death was not an accident as it appeared and was ruled; Vorstedt sabatoged the brakes to make her car go off the road, as he was trying to kill Riggs himself (who was not in the car).
** But played painfully straight in the second film when Vorstedt reveals that Riggs' wife's death was not an accident as it appeared and was ruled; Vorstedt sabatoged the brakes to make her car go off the road, as he was trying to kill Riggs himself (who was not in the car).
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* MakeItLookLikeAnAccident: Parodied in the third film. After Riggs and Murtaugh are busted down to patrolmen, they catch a guy jaywalking; when they say they're gonna cite him for it, the jaywalker is apoplectic. "You've got people actually committing crimes in this city, and you're busting me for crossing the street?" Eventually, he gets on Riggs' nerves to the point where he's about to pull his gun on him. "Lemme shoot him, Roger! We can make it look like suicide!" After the jaywalker takes off on Roger's advice ("Get out of here before my partner kills you! No, not ''that'' way, the ''other'' way!"), Riggs and Murtaugh both laugh their asses off-- off - they were only having a little fun with the guy, apparently.
** But played painfully straight in the second film when Vorstedt reveals that Riggs' wife's death was not an accident as it appeared and was ruled; Vorstedtsabatoged sabotaged the brakes to make her car go off the road, as he was trying to kill Riggs himself (who was not in the car).
** But played painfully straight in the second film when Vorstedt reveals that Riggs' wife's death was not an accident as it appeared and was ruled; Vorstedt
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** Also Arjen Rudd in the second movie. Near the end of the movie he starts to shoot at the policemen and claims [[DiplomaticImpunity diplomatic immunity]] that can protect one from being arrested but not, you know, from being shot in self defense. Should he refrained from shooting, the protagonists could have done nothing without provoking major international incident.
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** Also Arjen Rudd in the second movie. Near the end of the movie he starts to shoot at the policemen and claims [[DiplomaticImpunity diplomatic immunity]] that can protect one from being arrested but not, you know, from being shot in self defense. Should Had he refrained from shooting, the protagonists could have done nothing without provoking a major international incident.
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* ChekhovsSkill: Riggs ability to dislocate and reset his shoulder was used as a gag early in the second movie, only to become important to Riggs escaping a death trap. Similarly, in the third movie Riggs taught Murtaugh a basic defensive kick which was made into a prank with Murtaugh kicking over a water cooler, with Murtaugh used instinctively in the climax.
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* ChekhovsSkill: Riggs Riggs' ability to dislocate and reset his shoulder was used as a gag early in the second movie, only to become important to Riggs escaping a death trap. Similarly, in the third movie Riggs taught Murtaugh a basic defensive kick which was made into a prank with Murtaugh kicking over a water cooler, with which Murtaugh used instinctively in the climax.
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* EvenEvilHasStandards: Gangster Tyrone in the third movie is visibly disgusted at Jack Walsh's disposing of a rebellious mook by burying him alive in wet cement.
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* EvenEvilHasStandards: Gangster Tyrone in the third movie is visibly disgusted at Jack Walsh's Travis's disposing of a rebellious mook by burying him alive in wet cement.
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* EvenEvilHasStandards: Gangster Tyrone in the third movie is visibly disgusted at Jack Walsh's disposing of a rebellious mook by burying him alive in wet cement.
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* EvilVersusEvil: The Corrupt Chinese general's men vs. The Chinese Triads. As Riggs said "Let them kill each other."
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* EvilVersusEvil: The Corrupt Chinese general's men vs. The Chinese Triads. As Riggs said "Let them kill each other."
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* {{Fanservice}}: Amanda Hunsaker kills herself toplessly, for no reason at all.
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* BattleInTheRain: The final fights of the first and fourth movie.
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** Also, in Britain the theatrical release of ''Lethal Weapon 2'' cuts the scene where [[spoiler: Riggs kills two of the villains who drowned Rika after he [[ChekhovsGun uses his Houdini impression]] to escape the same fate]].
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** A ''literal'' one is in the third film, with the machine gun loaded with "cop killers." Sold to Tyrone by Travis, who then sells it to Darryl, it is taken by Murtaugh when he kills Darryl. Later he uses it against the bad guys and finally tosses it to Riggs - who uses it to kill Travis.
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* [[spoiler:DidNotDieThatWay]]: Martin's wife was said to have been killed in a car accident. [[spoiler:Turns out in ''Lethal Weapon 2'' that the "accident" in question was a deliberate hit-and-run by that movie's BigBad that was meant to kill Riggs himself but got her instead]].
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-->'''Riggs:''' You better start telling me more than [[CrowningMomentofFunny jack shit]].
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** Lorna Cole isn't above using [[GroinAttack groin attacks]] either as evidenced in Lethal Weapon 3 when she grabs a man by his junk and pulls it upward rather...painfully.
--> '''Lorna:''' This PMS... It's a bitch!"
--> '''Lorna:''' This PMS... It's a bitch!"
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* TropeMaker
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** Pretty [[DeconstructedTrope deconstructed]] in the fourth movie, when his age takes away the 'lightning part'. He's still faster and a better fighter than Murtaugh, but his age showing in his fighting prowess is a major plot-point.
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** Pretty [[DeconstructedTrope deconstructed]] Deconstructed]] in the fourth movie, when his age takes away the 'lightning part'. He's still faster and a better fighter than Murtaugh, but his age showing in his fighting prowess is a major plot-point.
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** Also, Riggs and Lorna flirting in the third film, Riggs mentions a 'whole family of .44s on the back' from where [[spoiler: Arjen Rudd shot him at the end of LW2]] and he also mentions [[spoiler: the knife Vorstedt got him with in the leg at the climax.]]
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** Also, Riggs and Lorna flirting in the third film, Riggs mentions a 'whole family of .44s on the back' from where [[spoiler: Arjen Rudd shot him at the end of LW2]] [=LW2=]]] and he also mentions [[spoiler: the knife Vorstedt got him with in the leg at the climax.]]
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* OneSceneWonder: The pyromaniac in the beginning of the fourth film.
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* DiplomaticImpunity: [[strike:Arjen]] Aryan Rudd claims diplomatic immunity to make the heroes back off in the second movie. (Although in fact, he was only a consular officer, and they get a lower grade of immunity - unless he had some other official status as well, he could have been searched provided proper procedures were followed.)
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* DiplomaticImpunity: [[strike:Arjen]] Aryan Arjen Rudd claims diplomatic immunity to make the heroes back off in the second movie. (Although in fact, he was only a consular officer, and they get a lower grade of immunity - unless he had some other official status as well, he could have been searched provided proper procedures were followed.)
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* PluckyComicRelief: Leo Getz in all movies after the first, but manages to stay out of [[TheScrappy Scrappy]] territory because Riggs and Murtagh annoy him just as much as he annoys them.
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* PluckyComicRelief: Leo Getz in all movies after the first, but manages to stay out of [[TheScrappy Scrappy]] territory because Riggs and Murtagh Murtaugh annoy him just as much as he annoys them.
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''Lethal Weapon'' is a tetralogy of American action movies/comedies directed by Richard Donner and starring Creator/MelGibson and Danny Glover as a pair of mismatched detectives in the LAPD. The first movie effectively [[TropeMakers defined]] the entire BuddyCopShow genre. The unbalanced, unhinged Riggs was contrasted with calmer, stricter family man Murtaugh.
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''Lethal Weapon'' is a tetralogy of American action movies/comedies directed by Richard Donner and starring Creator/MelGibson and Danny Glover as a pair of mismatched detectives in the LAPD. The first movie effectively [[TropeMakers defined]] the entire BuddyCopShow genre. The unbalanced, unhinged Riggs was contrasted with calmer, stricter family man Murtaugh.
Murtaugh. All four films were directed by Creator/RichardDonner.
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* HonorBeforeReason: In the climax of the fourth film, Riggs and Murtaugh had successfully thwarted the bad guys plans. But [[spoiler: they killed Ku's brother, leaving him seriously pissed]]. They had more than enough time to make their exit and stay away from Ku's wrath and even begin to walk the other way, talking about coming back with a howitzer or something like it. But Riggs started musing about Ku's crazy gun dismantling trick he pulled earlier in the film and they realized they had to face him to end it.
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* TheWorfEffect: Done interestingly in the fourth film. Riggs realizes his age when the primary henchmen on the boat handily kicked his ass. But Ku ends up [[YouHaveOutlivedYourUsefulness dispatching that henchmen]] with embarrassing little effort, proving that he will be quite an enemy to beat.
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* HotAmazon: Lorna Cole.
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* SaltAndPepper
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* SaltAndPepperSaltAndPepper: Subverted, Murtaugh is the old, grizzled but by-the-book cop, Riggs is the titular lethal weapon.
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-->'''Murtaugh''' and '''Riggs'''
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** How Roger takes care of the driver of [[spoiler: General McAllister's car.]]
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** How Roger takes care of the driver of [[spoiler: General McAllister's [=McAllister=]'s car.]]
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* BombproofAppliance: A bathtub. The MythBusters eventually tested this as in the scene, and aside from the detonation method, it all worked exactly as advertised.
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* BombproofAppliance: A bathtub. The MythBusters eventually tested this as in the scene, and aside from the detonation method, method (which actually took ''longer'' to go off), it all worked exactly as advertised.
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**But played painfully straight in the second film when Vorstedt reveals that Riggs' wife's death was not an accident as it appeared and was ruled; Vorstedt sabatoged the brakes to make her car go off the road, as he was trying to kill Riggs himself (who was not in the car).
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''Lethal Weapon'' is a tetralogy of American action movies/comedies directed by Richard Donner and starring MelGibson and Danny Glover as a pair of mismatched detectives in the LAPD. The first movie effectively [[TropeMakers defined]] the entire BuddyCopShow genre. The unbalanced, unhinged Riggs was contrasted with calmer, stricter family man Murtaugh.
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''Lethal Weapon'' is a tetralogy of American action movies/comedies directed by Richard Donner and starring MelGibson Creator/MelGibson and Danny Glover as a pair of mismatched detectives in the LAPD. The first movie effectively [[TropeMakers defined]] the entire BuddyCopShow genre. The unbalanced, unhinged Riggs was contrasted with calmer, stricter family man Murtaugh.
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* JustHereForGodzilla: For people familiar with Hong Kong kung fu movies, this may be their reason for going to see the fourth instalment.
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[[quoteright:350:http://static.tvtropes.org/pmwiki/pub/images/LethalWeaponRA2_9259.jpg]]
[[caption-width-right:350:Riggs and Murtaugh]]
->''"See how easy that was? Boom, still alive. Now we'' question ''him. You know why we question him? Because I got him in the leg. I didn't shoot him full of holes or try to jump off a building with him!"''
->'''"Hey, that's no fair. [[ITakeOffenseToThatLastOne The building guy lived.]]"''
-->'''Murtaugh''' and '''Riggs'''
''Lethal Weapon'' is a tetralogy of American action movies/comedies directed by Richard Donner and starring MelGibson and Danny Glover as a pair of mismatched detectives in the LAPD. The first movie effectively [[TropeMakers defined]] the entire BuddyCopShow genre. The unbalanced, unhinged Riggs was contrasted with calmer, stricter family man Murtaugh.
In ''Lethal Weapon'' (1987), Glover is playing Roger Murtaugh, the strict cop that plays by the rules, and worries about getting too old ([[CatchPhrase for this shit]]). He is partnered with Martin Riggs, a suicidal badass despairing over the death of his wife. Riggs is well versed with both martial arts and gun play and added to his [[TheBerserker berserker]] tendencies makes him a candidate to be registered as a [[TitleDrop lethal weapon.]] They start tracking down a major drug dealer who has ties within the force.
In ''Lethal Weapon 2'' (1989), they received a comedy sidekick played by Joe Pesci as a witness and insider to the new bad guys. The BigBad of the movie was Arjen Rudd, a South African diplomat using diplomatic immunity to hide behind drug smuggling. As it turned out, [[spoiler:he was responsible for the death of Mrs. Riggs.]]
In ''Lethal Weapon 3'' (1992), Riggs finds a new LoveInterest in Lorna Cole (Rene Russo), a fellow cop who is as tough and crazy as he is. She helps them to investigate a rogue officer who's been selling specialized armor piercing "cop killer" bullets to the mob and onto the streets. Looming over Murtaugh's head is his upcoming retirement and trying to figure out his life as a cop and what it will be like after retirement.
In the final installment, ''Lethal Weapon 4'' (1998), Lorna is pregnant with Riggs' baby and both he and Murtaugh are contemplating the implications of growing older. Meanwhile, Riggs and Murtaugh receive a brash younger detective named Lee Butters (Chris Rock) and are dealing with Chinese Triads when they uncover a boatload of illegal immigrants. [[DragonInChief The Dragon (In Chief)]] /BigBad of this group is Wah Sing Ku, played by JetLi, by whom Riggs finds himself entirely outmatched.
Each movie played out like a cross between the typical cop show and ''Franchise/IndianaJones'', with spectacular stunts at a breakneck pace while following a chain of evidence.
Now has a [[Characters/LethalWeapon character sheet]]
!!Trope Examples:
* AbhorrentAdmirer: Delores towards Rog in the 3rd movie.
* ActionGirl: Lorna Cole.
* ActuallyPrettyFunny: Eventually, even Murtaugh can't help but chuckle at the "rubber plant" left on his desk in ''Lethal Weapon 2.''
* AddictionDisplacement: From cigarettes to ''dog biscuits''.
** As well as the onion.
** By the end of Lethal Weapon 3, he jokes about going back to cigarettes to deal with his "dog biscuit problem".
* TheAllegedCar: Murtaugh's wife's station wagon turns into this over the course of the second film.
* AllGirlsWantBadBoys: The first movie, when Riggs has dinner with Murtaugh's family, the oldest daughter is making eyes at Riggs, and the attraction seems to come from this, especially when Riggs sides with her in a father-daughter fight over her marijuana use.
** As a result, Murtaugh is paranoid about his daughter and Riggs ''during the entire freaking series!!!''
** Rika in the second film, Lorna from 3 onward.
*** For that matter, presumably the late Mrs. Riggs.
** Unfortunately for Murtaugh, another detective named Lee Butters got to her while he was distracted.
* AnAssKickingChristmas: The first movie.
* AndThisIsFor: Riggs does this in the final scene of part 2 when he starts shooting one of the bad guys and saying the names of all the slain officers [[spoiler:and Rika.]]
* AngryGuardDog: Deconstructed in ''Lethal Weapon 3.'' Riggs and Cole face a rottweiler guard dog in a warehouse, and Riggs proceeds to placate the dog with [[ChekhovsGun dog biscuits Murtaugh gave him to help quit smoking]]. They rescue him in the ensuing impromptu gun raid, and Riggs ''still'' keeps him as a pet in the fourth film.
* TheArtifact: In the second film Leo is introduced as a key witness and much of the plot revolves around protecting him; for the rest of the series he is reduced to the PluckyComicRelief, though he still briefly helps out in both cases.
* AteHisGun: Riggs is outright suicidal in the first film. In an early scene, he actually puts his gun in his mouth, but doesn't shoot.
* AvengingTheVillain: Near the end of the fourth film Wah Sing Ku is attempting to flee Riggs and Murtaugh with his brother, all the other villains having been killed. When Murtaugh shoots Ku's brother while aiming for Ku himself, Ku sticks around and tries to kill Riggs and Murtaugh in revenge. [[spoiler: Riggs then shoots Ku underwater after they fall off a pier while fighting.]]
* BadassBoast: Riggs has several throughout, but his DefiningCharacterMoment in the first film really hits this trope hard: "When I was 19, I did a guy in Laos from a thousand yards out. It was a rifle shot in high wind. Maybe eight or even ten guys in the world could have made that shot. It's the only thing I was ever good at."
* BashBrothers: Riggs and Murtaugh don't embody this trope until the final fight against Ku in the fourth movie.
* BeamMeUpScotty: Inverted. Murtaugh's {{catch phrase}} is "I'm too old for this shit", not "I'm ''getting'' too old for this shit", but he says the latter in ''Lethal Weapon 3''.
* BlondGuysAreEvil: Mr. Joshua in the first film, and the South Africans in the second.
* BombproofAppliance: A bathtub. The MythBusters eventually tested this as in the scene, and aside from the detonation method, it all worked exactly as advertised.
* BondOneLiner: From the second film: "Nailed 'em both." Also, the one in the next entry.
* BoomHeadshot: Roger's signature maneuver, done once a film, after rolling his head from side-to-side to crack his neck.
** How Roger takes care of the driver of [[spoiler: General McAllister's car.]]
** After Arjen claims "[[DiplomaticImpunity Diplomatic immunity]]", Murtagh puts a bullet in his head.
-->'''Murtaugh:''' [[BondOneLiner It's just been revoked.]]
* {{Bowdlerize}}: The films are played quite frequently on TNT and TBS, which are infamous for censoring language in films. For someone who's familiar with the theatrical version of the first film, watching it on one of these networks can be quite hilarious for that very reason. Unfortunately, sometimes the censorship seems unnecessary and arbitrary-- like when they cut out Riggs punching the guy on the hood of the car in ''Lethal Weapon 3'' after asking if he was all right.
* BrickJoke: [[ChekhovsGun Chekhov's Nailgun]] has a longer run than you'd expect. In the third film, it reminds Murtaugh, who is trying to sell his house, that he ''forgot to get permits to repair his blown-up house!''
** After Murtaugh's daughter appears in a condom advertisement, Murtaugh bemoans how his police colleagues will be planting condoms wherever he goes. [[spoiler:That night Murtaugh and his family are attacked in their home and no-one is interested in playing jokes on him...until later on in the movie when Murtaugh shoos away some cops crowding around his desk only to find they've planted a 'rubber tree' there. Even Murtaugh can't help breaking down in laughter.]]
* BunnyEarsLawyer: Martin Riggs.
* [[BuddyCopShow Buddy Cop Film]]
* CallForward: The musical riffs we first hear in the original film are later used in Sting and Eric Clapton's "It's Probably Me", the hit single from the third film.
* CareerBuildingBlunder: After the third film, where Riggs and Murtaugh were busted down to patrolmen for messing with the bomb squad's job (and blowing up a building), the fourth film has the department unable to get their insurance renewed due to the propensity of the duo causing catastrophic damage in their escapades. But since they can't be demoted off the streets, the department decides to ''promote'' them, fully ''two'' steps, bypassing Lieutenant and making them both Captains, at least until the insurance is renewed, in an attempt to get them off the streets. ''It does not work''.
* CareerResurrection: The original was one for Gary Busey.
* CatchPhrase: Most famously Murtaugh's "I'm too old for this shit," as well as his "Go spit, Riggs!"
** Leo has one as well: "OK, OK, OK..."
*** Ku, from the fourth film: "If this was Hong Kong, you'd be dead."
* TheCavalryArrivesLate: The end of the second film.
** The SWAT team arriving about a minute or so after Riggs shoots the playground sniper near the beginning of the first film.
*** This scene was (wisely) cut from the theatrical release and reinserted for the DirectorsCut DVD.
** Subverted in the third film, where Riggs argues that [[LampshadeHanging the bomb squad never gets here on time]]!"; they meddle with the bomb, it goes off, a massive building is levelled... and the bomb squad immediately pulls up, having arrived in plenty of time to deal with the bomb had Riggs not interfered.
* CementShoes: In ''Lethal Weapon 3'', Travis shoves a {{Mook}} who [[YouHaveFailedMe has failed him]] into a foundation and has cement poured over him. Quoth Travis: "[[BondOneLiner Now we have a relationship we can build on!]]"
* CharacterDevelopment: Riggs starts off as a suicidal, lonely man and at the end of the fourth movie is shown to be a happy member of a large family.
* [[ChekhovsGun Chekhov's]] [[IncrediblyLamePun Nailgun]]: In ''Lethal Weapon 2.''
** [[ChekhovsGun Chekhov's]] [[IncrediblyLamePun Dog Biscuits]] for AngryGuardDog, for that matter
*** [[ChekhovsSkill Chekhov's]] [[OverlyLongGag Dislocated Shoulder]] which keeps coming back. In the second film, Riggs voluntarily dislocating his shoulder to get out of a straitjacket on a bet is used comedically to show how nuts he is. But [[spoiler: when the villains try to kill him by putting him in a straitjacket and tossing him into a river, he's able to get out of it, swim up to the surface, and take out two of them.]]
** During the fight with Wah Sing Ku, after he dislocated Riggs' shoulder, Riggs gives him a short but brutal NoHoldsBarredBeatdown.
*** He also has to reset his shoulder twice in the third film, though not under such mortal circumstances. At one point, he slides himself into a pole to do so on the fly.
* ChekhovsSkill: Riggs ability to dislocate and reset his shoulder was used as a gag early in the second movie, only to become important to Riggs escaping a death trap. Similarly, in the third movie Riggs taught Murtaugh a basic defensive kick which was made into a prank with Murtaugh kicking over a water cooler, with Murtaugh used instinctively in the climax.
* ColdBloodedTorture: Riggs and Murtaugh are both subjected to this in the first film, as the bad guys try to find out from them what the police know. It doesn't work, because the cops don't know much of ''anything,'' and because Riggs is able to escape from Endo and go on a rampage.
* CombatPragmatist: Despite being a highly trained martial artist, Riggs isn't against [[GroinAttack groin attacks]], unsing improvised weaponry, dropping a crate on a man, or killing him with a machine gun when it becomes clear he's not going to win a fist fight.
* ComicallyMissingThePoint: From ''Lethal Weapon 3:''
--> '''Murtaugh:''' When are you gonna learn you can't solve every problem with your fists?
--> '''Riggs:''' Well, I couldn't use my gun; there was a crowd.
* ContinuityNod: Many scenes from previous films are mentioned throughout the series. Perhaps the funniest continuity nod is in ''Lethal Weapon 3'', in which Leo serves a realty agent trying to help Roger sell his house. Because of full disclosure issues, when the prospective buyers mention that they love the picture window, he says it's recently been replaced because a drug dealer crashed his car through it and shot the entire place up. (A reference to the first film, but see below). Then he has to mention the damage that happened in ''Lethal Weapon 2'':
--> '''Leo Getz:''' The bathroom upstairs has been completely remodeled due to unexpected bomb damage.
** Granted the thing with the picture window happened before Leo knew Riggs and Murtaugh, and therefore he may have been told a different story from what really happened-- but [[spoiler:it was the ''good guys'' who actually drove the car through the window]] in the first film.
*** FridgeBrilliance: Murtaugh would probably have spun the story that way to the insurance company.
** Also, Riggs and Lorna flirting in the third film, Riggs mentions a 'whole family of .44s on the back' from where [[spoiler: Arjen Rudd shot him at the end of LW2]] and he also mentions [[spoiler: the knife Vorstedt got him with in the leg at the climax.]]
* CrazyPrepared: Not so much crazy as it was clever, but Lorna managed to survive a potentially fatal cop-killer bullet wound by wearing ''two'' {{Bullet Proof Vest}}s just in case.
* TheDanza: Delores Hall plays Delores in ''Lethal Weapon 3''.
* DiplomaticImpunity: [[strike:Arjen]] Aryan Rudd claims diplomatic immunity to make the heroes back off in the second movie. (Although in fact, he was only a consular officer, and they get a lower grade of immunity - unless he had some other official status as well, he could have been searched provided proper procedures were followed.)
** For extra ballsiness, at one point he does this while SHOOTING at Riggs.
*** And Murtaugh [[CrowningMomentOfAwesome revokes it a second later.]]
* TheDragon: Typically opposing Riggs. Mr. Joshua in the first, Pieter in the second.
* DragonTheirFeet: In the first film, [[spoiler:while General [=McAllister=] was barbecuing his nuts on Hollywood Boulevard, Mr. Joshua went to Murtaugh's house to go after Roger's family. But there was "nobody here but us good guys".]]
* DrivenToSuicide: The first film ''opens'' with one, as [[spoiler: young Amanda jumps off a balcony]].
* EarnYourHappyEnding: Every movie but the second, which is decidedly more [[BittersweetEnding bittersweet.]]
* ElNinoIsSpanishForTheNino: In the fourth film, when Riggs, Murtaugh, and Butters seek to question Uncle Benny at a dentist's office, they give him a dose of laughing gas to make him more complacent, except they give him too much gas, making him way too aloof and carefree to be very helpful. His one clue as to the location of the Hongs is "Yao Mihn Bi". When asked what that means, Uncle Benny explains, "'Yao Mihn Bi' means... 'Yao Mihn Bi'."
* EvilAlbino: Mr. Joshua.
* EvilBrit: Jack Travis in the third movie.
* EvilCounterpart: Mr. Joshua again.
* FridgeBrilliance: One instance actually happens in-universe, and is not trivia.
-->'''Roger Murtaugh''': You ever hear of Ebony Clarke?
-->'''Martin Riggs''': Yeah, she writes those cheesy sex novels... why? You boinkin' her?
-->'''Roger Murtaugh''': No I'm not boinkin' her, Trish is Ebony Clarke.
-->'''Martin Riggs''': So you ''are'' boinkin' her.
-->'''Roger Murtaugh''': [''big grin''] Yeah, Yeah I'm boinkin' her!
* EvilVersusEvil: The Corrupt Chinese general's men vs. The Chinese Triads. As Riggs said "Let them kill each other."
* FollowTheLeader: The series spawned a ''lot'' of buddy-cop films.
* {{Foreshadowing}}: In the first film, there's a magnet on the Murtaughs' refrigerator that says something to the effect of "End apartheid in South Africa." Guess who the villains of the second film are?
* FromTheMouthsOfBabes: The six-year-old witnesses to [[spoiler:Dixie's house being bombed]] in the first film. "You're gonna bust Dixie! You're gonna bust Dixie!" Later, [[spoiler:after the bombing]]: "My Mom says policemen shoot black people!" Mel Gibson looked like he was legitimately cracking up in that scene.
* GenreSavvy: Subverted hilariously. In the third film, Riggs insists that he and Murtaugh go into the parking garage to try and defuse the bomb because "the bomb squad never gets there on time", as if that's a truism he's learned from experience or possibly from watching too many movies. After Riggs screws it up ("GRAB THE CAT!"), the bomb squad arrives seconds later. They would have had more than enough time to defuse the bomb if not for Riggs. They give him a sarcastic round of applause, too.
** Played straight by Murtaugh in the same scene, who argues against messing with the bomb because he's only eight days from retirement and he doesn't want to do anything stupid.
** Played straight in the first film by the bus driver whose car collides with [=McAllister's=]. He quickly backs the bus back several yards, [[spoiler:just in case the car were to explode.]] Smart man.
* GilliganCut: Murtaugh, stuck on the toilet, begs Riggs to keep his call to the bomb squad discrete. Guess what happens instead?
* GiveMeASword: Murtaugh tosses Riggs a nightstick in the fight with Mr. Joshua near the end of the first film, in response to the latter using a pole against him.
* GonnaNeedABiggerWarrant: The crimes always end up being more complex and involved than they appear on the surface.
* GoodCopBadCop: Almost immediately after meeting Leo Getz in ''Lethal Weapon 2,'' Riggs tells him to shut up. Getz says, "Oh, I get it-- good cop, bad cop." Then Murtaugh ''also'' tells him to shut up. "Okay... ''bad'' cop, bad cop."
* GoodIsNotDumb: After Riggs is blown through a window by a shotgun in the first film (he was wearing his bulletproof vest, so he didn't die), he points out to Murtaugh that now the police have the advantage, because the bad guys think Riggs is dead. Sure enough, Mr. Joshua calls the police station for information about the shooting, claiming to be a news reporter. The officer who picks up confirms that Riggs is dead, and it never occurs to [=McAllister=] and Joshua that the police could be deceiving them.
* GoofyPrintUnderwear: Murtaugh from 4; when directed by Riggs to strip to his boxer shorts to distract a madman wielding a flamethrower, Riggs asks with a laugh "Are those little hearts?"
* GunsDoNotWorkThatWay: The idea that "cop killer" bullets are an option for normal pistol calibers is nonsense. By the time you've juiced up, say, a regular 9mm with a sufficiently hardened bullet (just being pointy won't cut it) and enough propellant to punch through thick steel or kevlar, you'd need to create a special gun to fire it, because you've just invented an entirely new cartridge. Best to just chalk the whole mess up to RuleOfCool.
** Very, very minor truth in television with the Russian [=GSh=]-18 pistol, which is designed for just such an overpressure 9x19mm round. The timing's off, though, having entered service a full 20 years after the third movie. Even then, using said round in a weapon chambered for 9x19mm Luger will quickly ruin the gun, so the original point stands.
** Actually 9mm Parabellum round gives pretty high maximum pressure, so overpressurized load complete with hardened and specifically shaped (or saboted) round could easily defeat an ordinary kevlar vest. On the other hand, using such ammo in the ordinary SMG set to full auto would be extremely dangerous to the shooter.
* HairTriggerTemper: Averted; Joe Pesci is famous for such roles played scarily straight but his character Leo Getz is harmless. In fact, he plays a fall guy. He's still liable to fly off the handle at the slightest provocation, but everyone's more than aware it's all bluster and Riggs and Murtagh are more than willing to tell him to shut up.
* HeavilyArmoredMook: The flamethrower and machinegun wielding lunatic at the start of the fourth movie.
* HeroicBSOD: In the second film, when TheDragon [[spoiler: reveals he killed Riggs' wife Victoria, and then he kills Rika, too.]]
** In the third film, Murtaugh [[DrowningMySorrows goes on a drinking binge]] after he was forced to kill a teenager (who was a friend of his son's). In a RoleReversal, Riggs has to play the sane man in the entire episode.
** [[HesBack He's Back]]: And when he recovers from it, and is told by said teenager's mourning parents to "get the man who put the gun in [their] son's hands" ... [[TheAtoner oh boy, is he back.]]
* HeterosexualLifePartners: Riggs & Murtaugh. But bordering on HoYay; arguably, ''deep'' within HoYay territory.
-->'''Riggs''': You're the only family I've got! I've got three beautiful kids, I love them, they're yours. Trish does my laundry, I live in your icebox, I live in your life!
* HeyItsThatGuy[=/=]CaliforniaDoubling: The guy who says "Bravo" after the first building was blown up in the third film? None other than Bill Frederick, then the mayor of Orlando, Florida. The building used was Orlando's old City Hall building. Those familiar with the city will also recognize the [=SunTrust=] Center, the Orlando Utilities Commission building, and the new/current City Hall (which had a Coca-Cola sign planted on it). You can even make out a TV van from local ABC affiliate WFTV during the implosion.
** The building imploded post-credits was in St. Petersburg, Florida.
* HoistByHisOwnPetard:
** The fact that [[spoiler:General Mc Allister has explosives in his car enables Roger to kill him (by killing his driver, causing an overturned-vehicle crash)]] in the first film.
** Riggs [[spoiler:stabs [[TheDragon Vorstedt]] with his own knife]] in the second film.
** Riggs [[spoiler: kills Travis with a gun modified with cop-killer bullets (which Travis helped put back on the streets to begin with)]] in the third film.
*** And it is in fact the ''very same gun'' used by the boy Murtaugh shot. Which Travis stole from LAPD impound and sold to the boy in the first place.
* HotAmazon: Lorna Cole.
* HotPursuit: Played straight to the point of parody to the point of subversion back around to straight, all in record time.
* IdiotBall: ''"Wow, good thing we escaped your evil employers who just tried to kill us, Miss Van den Haas. Now let's drop you off at your apartment, where they know you live, without any police protection!"'' *hands ball to her* ''"Hey, great idea, Officer Riggs!"''
** Also Arjen Rudd in the second movie. Near the end of the movie he starts to shoot at the policemen and claims [[DiplomaticImpunity diplomatic immunity]] that can protect one from being arrested but not, you know, from being shot in self defense. Should he refrained from shooting, the protagonists could have done nothing without provoking major international incident.
* ImprobableAimingSkills: Riggs pulls off some incredible shots. Sure, Murtaugh has his share, but Riggs was breast-fed on this trope. The sniper in the school, being able to shoot a smiley-face on the firing range, being able to ''successfully hit a helicopter God knows how many yards away'', etc. all with a pistol. And then picking off Shadow Company mooks like flies. And that's just the ''first film''.
** In part 2, how about fatally shooting the pilot of a helicopter in the dark from about 100 yards away. With a pistol.
** The "have-a-nice-day" moment in the first film. Murtaugh [[LampshadeHanging lampshades]] Riggs' improbable aiming skills perfectly:
---> '''Murtaugh''' ''[re: Riggs' gun]:'' You sleep with that thing under your ''pillow'' or something?
---> '''Riggs:''' [[MarriedToTheJob I would]] [[TheInsomniac if I]] ''slept.''
** When Roger rolls his head from side-to-side and cracks his neck, watch out.
** As for Murtaugh, he pulls off an excellent shot to kill the BigBad of both parts 1 and 2. In part 1, he shoots the driver of a car coming right at him, and then gets out of the way as the out-of-control car goes flying onto Hollywood Boulevard and smashes into a bus. And in part 2, he revokes Rudd's diplomatic immunity with a damned impressive head shot.
*** In fact, in part 2, Murtaugh not only scores a head shot on Rudd, but the bullet ''goes through Rudd's photo on his diplomat ID.'' Making it, in fact, ''two [[StealthPun headshots]] with one bullet.'' [[RuleOfCool Yeah.]]
** Funny enough, it's {{averted}} completely in the third film--where Murtaugh has to ventilate a shed to get Darryl, then uses a machine gun on Jack Travis--and {{deconstructed}} in the fourth, where Wah dodges the shot--only for it to hit and kill his brother.
* InterruptedSuicide
* ItsPersonal: Each movie eventually turns into this. Riggs even says the trope by name in part 2.
* JustHereForGodzilla: For people familiar with Hong Kong kung fu movies, this may be their reason for going to see the fourth instalment.
* KickedUpstairs: Riggs and Murtaugh are both promoted to Captain in the fourth film, in the hopes that giving them desk jobs will cut down on the destruction they cause in the city. It doesn't work.
* LargeHam: Riggs, expecially in the first movie.
---> '''Riggs:''' Do you really wanna jump ?! DO YOU WANNA?!? Alright, then, let's do it!
* LethalChef: Trish Murtaugh.
* LightningBruiser: Riggs of the hard hitting fast guy type.
** Pretty [[DeconstructedTrope deconstructed]] in the fourth movie, when his age takes away the 'lightning part'. He's still faster and a better fighter than Murtaugh, but his age showing in his fighting prowess is a major plot-point.
* MakeItLookLikeAnAccident: Parodied in the third film. After Riggs and Murtaugh are busted down to patrolmen, they catch a guy jaywalking; when they say they're gonna cite him for it, the jaywalker is apoplectic. "You've got people actually committing crimes in this city, and you're busting me for crossing the street?" Eventually, he gets on Riggs' nerves to the point where he's about to pull his gun on him. "Lemme shoot him, Roger! We can make it look like suicide!" After the jaywalker takes off on Roger's advice ("Get out of here before my partner kills you! No, not ''that'' way, the ''other'' way!"), Riggs and Murtaugh both laugh their asses off-- they were only having a little fun with the guy, apparently.
* MauveShirt: All the new detectives introduced in the second movie.
** The 22-year-old cop, Edwards, who's the butt of jokes at his expense about his age and height throughout the third film, and takes it all with good-natured, innocent charm. He ends up dead at the hands of Jack Travis.
* MeaningfulName: Leo tries to make this work for him. (And mostly just ends up annoying people.)
--> '''Leo Getz:''' My name's Leo Getz. Whatever you want, Leo gets. Get it?!
* MistakenForGay: Butters was ''trying'' to be nice to his [[spoiler: father-in-law.]]
* MoodDissonance: There's a tense scene in the first film in which Riggs prepares to blow his own head off-- while a ''Looney Tunes'' Christmas special is playing.
* NailEm: Murtaugh is attacked by South African agents and defends himself with a nail gun in ''Lethal Weapon 2''.
* NeckSnap: Riggs does this a lot.
* NoCelebritiesWereHarmed: The hockey teams playing at the Forum in ''Lethal Weapon 3'' were obviously meant to be the Los Angeles Kings and the Toronto Maple Leafs. The colors are just about identical. Look closely enough at the right time, though, and you'll see they're wearing generic uniforms.
** If you pay attention, the film actually features stock footage of the Los Angeles Kings and the Toronto Maple Leafs. They apparently couldn't get rights to use at least real NHL uniforms for the scenes they filmed.
* OddCouple: Riggs and Murtaugh, naturally!
* OhCrap: From the third film:
--> '''Riggs:''' Roger?
--> '''Murtaugh:''' Yeah?
--> '''Riggs:''' ''Grab the cat!''
** Possibly literally in the second film, when Murtaugh realizes that [[spoiler:the toilet he is sitting on is rigged to explode with a dead man's switch]].
* OldCopYoungCop
* OlderHeroVsYoungerVillain: A brutal example in the third film. Possible {{Deconstruction}}, definite TearJerker.
** Also in the fourth film with Wah Sing Ku who is younger than both Riggs and Murtaugh and very skilled in a deadly form of martial arts.
* OneSceneWonder: The pyromaniac in the beginning of the fourth film.
* OneManArmy: Riggs for the first three films, untl his age finally catches up to him in 4. In all fairness, the only guy he has trouble with in 4 is Jet Li's character.
* OverlyLongGag: The target takes a ''long'' time to get to the end of the range, and a ''long'' time to come back.
* PapaWolf: Murtaugh is ''fiercely'' protective of his family, but particularly his daughter Rianne. He even punches Riggs right in the face (and overboard) after Riggs says "I think I may have slept with someone I shouldn't have," leading Murtaugh to assume he was talking about Rianne. [[spoiler:He was talking about Lorna.]] Granted, he was drunk at the time.
** This is the culmination of three films worth of tension. Murtaugh has always been protective of Rianne, and has worried that Riggs might "go for her".
* PetTheDog: Literally. Riggs went from AxCrazy DeathSeeker to [[BunnyEarsLawyer Bunny Ears Cop]] when he chose to make friends with a guard dog instead of shooting him.
** He justifies it by saying that, while he's okay with shooting people, he's unable to shoot a dog. This probably would've been in effect even in the first movie.
** In the first film, Riggs gives an ''adorable'' prostitute $100 just to come home and watch television with him.
* PlatonicProstitution
* PluckyComicRelief: Leo Getz in all movies after the first, but manages to stay out of [[TheScrappy Scrappy]] territory because Riggs and Murtagh annoy him just as much as he annoys them.
* PoliticallyIncorrectVillain: The South Africans from the second film. What else would you expect from diplomats of the country that named Apartheid?
* ProductPlacement: From the first film:
--> '''Joshua:''' ''[while jacking a car]'' Mind if I test-drive your Audi?
* PreMortemOneLiner: Non-verbal version; after putting a bomb in Murtaugh's [[RefugeInAudacity toilet]], the bad guys wrote "boom" on the toiler paper.
* ThePurge: [[spoiler: The villain in Lethal Weapon 2 does this to the LAPD detectives investigating him, with Riggs and Murtaugh the only survivors.]]
* PsychoForHire: Mr Joshua.
* RealityIsUnrealistic: The {{Mythbusters}} tested the scene in the second film where Riggs and Murtaugh survive the toilet bomb by diving into the tub with a bomb blanket. The method would have worked, however, it was found that spraying the bomb with nitrogen would have given the characters a full fifteen minutes to walk out of the house, and diving into the tub wasn't necessary.
* RedemptionQuest: The entire series is one for Riggs. Murtaugh had his in the third movie [[spoiler:after killing a teenager in self-defence.]]
* RefugeInAudacity: Riggs with the suicide jumper in the first film. He was crazier than the jumper.
-->'''Martin Riggs:''' ''"'''DO YOU REALLY WANNA JUMP?''' Do you WANNA? Alright, then, let's do it!"''
** Riggs ''is'' this trope. His signal [[spoiler: for Murtaugh to go into the stilt house and start shooting the bad guys]] is to use his pickup truck to [[spoiler: start bringing the whole ''place'' down.]]
--> '''Murtaugh:''' Hey... what's your signal?
--> '''Riggs:''' You'll know it when it happens.
--> '''Murtaugh:''' ''[sighs]'' Somehow, I think I ''will'' know.
** In the third film, Riggs follows Travis out of the subway station by ''riding on the front of the subway car.''
* {{Retirony}}: Subverted. Early on in ''Lethal Weapon 3'', Murtaugh's wife shoves a bulletproof vest on him, to make sure he always wears it.
-->'''Roger Murtaugh:''' She loves me.
* {{Roaring Rampage of Revenge}}: Riggs in the second movie, when he [[spoiler: finds out that the South Africans killed his wife and his current girlfriend]]. Good thing Murtaugh was there...
** Not quite as vicious, but when Murtaugh returns after Darryl's funeral in the third movie, he goes person-to-person shaking people down to trace his gun. At the first one's house, the home of one of Darryl's homeys, he rants about how gang-banging is tantamount to self-genocide for their race.
* RunningGag: Getz's various "They fuck you with/at ___" rants, which even sparked a bizarre bonding moment between him and Butters, who previously had met in very bad terms. [[CrowningMomentOfFunny Butters was confused after their cooperative rant]].
** In the second film, Riggs and Murtaugh are always telling Leo to stay in the car, which he almost always ignores. [[spoiler: The one time he does what he's told, two bad guys commandeer the vehicle and kidnap him.]]
** Trish's [[CordonBleughChef bad cooking]] is frequently referenced throughout the series, including a great exchange where Roger wishes the toilet-bomb had instead been put in the kitchen stove. Riggs responds with [[CrowningMomentOfFunny "All the needless suffering could've been ended right there."]]
** "Hey guys, can I have a gun this time?" "''No''."
* RuthlessForeignGangsters: Wah Sing Ku and the Triads in the fourth movie.
** Arjen Rudd and the South African mobsters in the second one.
* SarcasticClapping: The bomb squad in the third (see TheCavalryArrivesLate).
* SaltAndPepper
* ScarSurvey: The scene where Cole and Riggs strip down to show off their scars.
* ShootEverythingThatMoves: Riggs tells Murtaugh the plan for rescuing Leo in the second movie:
-->'''Murtaugh:''' What's the plan?
-->'''Riggs:''' Wait for my signal, then just go in and shoot those fuckers.
* ShootingGallery: In the first movie, recently-teamed partners Riggs and Murtaugh are trying to one-up each other on the range. Murtaugh, annoyed at Rigg's tight bullethole group, sends a target further down the range and puts a single bullet through its 'head'. Riggs then sends his target all the way downrange, and shoots a smiley face in the head zone.
-->'''Riggs:''' Have a nice day.
* StayingAlive
* StealthParody: These movies are [[GenreSavvy more than aware of the genre they inhabit]], which many people don't catch. RogerEbert said that the main problem with the movie parody ''Loaded Weapon 1'' was that it was trying to make fun of a movie series that featured an exploding toilet.
* StealthPun: In the second film, when Murtaugh and Riggs are sitting in the bathroom and Roger is worried he's going to die on the toilet. After Riggs tells him that guys like him don't die on toilets, he adds:
-->'''Riggs:''' Besides, I'm here, and I have no plans on going right now.
* StuffedInTheFridge: The original plan for Rika in the second movie was for her to survive and attend the Thanksgiving party at Murtaugh's house with Riggs. Instead, she was killed off just so Riggs would be properly "motivated" for the rest of the movie.
* SuperSpeed: In the 4th movie they had to get JetLi to slow his fight scenes down because he was too fast for the actors to react to ''and the camera to catch on film.''
* SurvivalMantra: "We're not too old for this shit... we're not too old for this shit..."
* SuspiciouslySpecificDenial: In ''Lethal Weapon 3'', Riggs gets ahold of one of Jack Travis' flunkies at the garage in which he works, asking him "where's your buddy Travis?" After Lorna is waylaid by five other guys (and beats the crap out of them) while Riggs, Murtaugh and the original suspect watch, Riggs again asks the suspect where Travis is. "I told you, I don't know a Jack Travis." "I didn't say his name was ''Jack.''"
* TakeThat: ''Lethal Weapon 4'' contains some shockingly unsubtle jabs against the NRA. A bit hypocritical coming from a series that elevated [[IJustShotMarvinInTheFace dangerous and irresponsible gunplay]] to an art form.
* TemptingFate: In the first film. "There's no more heroes left in the world." Cue Riggs' BigDamnHeroes moment.
* TheyFightCrime
* TitleDrop: Done in the first film.
--> '''Murtaugh:''' File also said you're heavy into martial arts, T'ai Chi and all that killer stuff. I suppose we have to register you as a lethal weapon.
* TragicKeepsake: Murtaugh finds the watch he gave to the elderly Asian immigrant he befriended...
* TropeMaker
* UncleTomFoolery: Lee Butters.
* UnusuallyUninterestingSight: In the first film: When Riggs, Murtaugh and Lianne escape from the boiler room, they make their way to the main room of a nightclub. A guy holding a gun turns to face them and Riggs shoots and kills him almost instantly. It's very loud. ''No one seems to notice.'' He kills two more people in the nightclub, and no one reacts until the third kill.
** Earlier in the first film, this is averted when Hunsacker screams at Murtaugh to ''"KILL THEM! JUST KILL THEM!"'' Several people in the background briefly look in his direction.
* VaporTrail
* VillainousValour: Only Wah Sing Ku is able to disasemble a Beretta in 5 seconds with his own bare hands and then knocking off Riggs and Murtaugh who are older and taller than him. In the final showdown he once again manages to handle them even if they are two vs one.
* VisualPun: The "rubber" tree in ''Lethal Weapon 2''.
* VitriolicBestBuds: Riggs and Murtaugh may well be the Trope Codifiers.
* WireDilemma: Occurs in the third movie... and the bomb goes off.
* YouHaveFailedMe: In the second movie, after Rudd's henchman Hans loses a million dollars worth of gold Krugerrands, Rudd has him executed.
** He would've just killed the entire South African government, and [[DiplomaticImpunity gotten away with it because of diplomatic immunity]].
** Echoed in a scene later on, when [[TheDragon Pieter Vorstedt]] meets Rudd in his office. Rudd notices he seems to be looking at the floor, and then asks him what he's doing.
-->[[CrowningMomentOfFunny "I am just checking to make sure I am not standing on plastic."]]
** In the third film, the BigBad, Jack Travis, does this to ''both'' guys who attempted the armored car robbery, because they were "going into business for themselves" and running the risk of screwing up the entire operation. He has one of them [[CementShoes drowned in cement and left to be paved over]], and then goes into an interrogation room and shoots the other one in the head.
* YouJustRuinedTheShot: Riggs tries to save Rianne from what he thinks is a hostage situation, but turns out to be a scene in the movie she's in.
----
[[caption-width-right:350:Riggs and Murtaugh]]
->''"See how easy that was? Boom, still alive. Now we'' question ''him. You know why we question him? Because I got him in the leg. I didn't shoot him full of holes or try to jump off a building with him!"''
->'''"Hey, that's no fair. [[ITakeOffenseToThatLastOne The building guy lived.]]"''
-->'''Murtaugh''' and '''Riggs'''
''Lethal Weapon'' is a tetralogy of American action movies/comedies directed by Richard Donner and starring MelGibson and Danny Glover as a pair of mismatched detectives in the LAPD. The first movie effectively [[TropeMakers defined]] the entire BuddyCopShow genre. The unbalanced, unhinged Riggs was contrasted with calmer, stricter family man Murtaugh.
In ''Lethal Weapon'' (1987), Glover is playing Roger Murtaugh, the strict cop that plays by the rules, and worries about getting too old ([[CatchPhrase for this shit]]). He is partnered with Martin Riggs, a suicidal badass despairing over the death of his wife. Riggs is well versed with both martial arts and gun play and added to his [[TheBerserker berserker]] tendencies makes him a candidate to be registered as a [[TitleDrop lethal weapon.]] They start tracking down a major drug dealer who has ties within the force.
In ''Lethal Weapon 2'' (1989), they received a comedy sidekick played by Joe Pesci as a witness and insider to the new bad guys. The BigBad of the movie was Arjen Rudd, a South African diplomat using diplomatic immunity to hide behind drug smuggling. As it turned out, [[spoiler:he was responsible for the death of Mrs. Riggs.]]
In ''Lethal Weapon 3'' (1992), Riggs finds a new LoveInterest in Lorna Cole (Rene Russo), a fellow cop who is as tough and crazy as he is. She helps them to investigate a rogue officer who's been selling specialized armor piercing "cop killer" bullets to the mob and onto the streets. Looming over Murtaugh's head is his upcoming retirement and trying to figure out his life as a cop and what it will be like after retirement.
In the final installment, ''Lethal Weapon 4'' (1998), Lorna is pregnant with Riggs' baby and both he and Murtaugh are contemplating the implications of growing older. Meanwhile, Riggs and Murtaugh receive a brash younger detective named Lee Butters (Chris Rock) and are dealing with Chinese Triads when they uncover a boatload of illegal immigrants. [[DragonInChief The Dragon (In Chief)]] /BigBad of this group is Wah Sing Ku, played by JetLi, by whom Riggs finds himself entirely outmatched.
Each movie played out like a cross between the typical cop show and ''Franchise/IndianaJones'', with spectacular stunts at a breakneck pace while following a chain of evidence.
Now has a [[Characters/LethalWeapon character sheet]]
!!Trope Examples:
* AbhorrentAdmirer: Delores towards Rog in the 3rd movie.
* ActionGirl: Lorna Cole.
* ActuallyPrettyFunny: Eventually, even Murtaugh can't help but chuckle at the "rubber plant" left on his desk in ''Lethal Weapon 2.''
* AddictionDisplacement: From cigarettes to ''dog biscuits''.
** As well as the onion.
** By the end of Lethal Weapon 3, he jokes about going back to cigarettes to deal with his "dog biscuit problem".
* TheAllegedCar: Murtaugh's wife's station wagon turns into this over the course of the second film.
* AllGirlsWantBadBoys: The first movie, when Riggs has dinner with Murtaugh's family, the oldest daughter is making eyes at Riggs, and the attraction seems to come from this, especially when Riggs sides with her in a father-daughter fight over her marijuana use.
** As a result, Murtaugh is paranoid about his daughter and Riggs ''during the entire freaking series!!!''
** Rika in the second film, Lorna from 3 onward.
*** For that matter, presumably the late Mrs. Riggs.
** Unfortunately for Murtaugh, another detective named Lee Butters got to her while he was distracted.
* AnAssKickingChristmas: The first movie.
* AndThisIsFor: Riggs does this in the final scene of part 2 when he starts shooting one of the bad guys and saying the names of all the slain officers [[spoiler:and Rika.]]
* AngryGuardDog: Deconstructed in ''Lethal Weapon 3.'' Riggs and Cole face a rottweiler guard dog in a warehouse, and Riggs proceeds to placate the dog with [[ChekhovsGun dog biscuits Murtaugh gave him to help quit smoking]]. They rescue him in the ensuing impromptu gun raid, and Riggs ''still'' keeps him as a pet in the fourth film.
* TheArtifact: In the second film Leo is introduced as a key witness and much of the plot revolves around protecting him; for the rest of the series he is reduced to the PluckyComicRelief, though he still briefly helps out in both cases.
* AteHisGun: Riggs is outright suicidal in the first film. In an early scene, he actually puts his gun in his mouth, but doesn't shoot.
* AvengingTheVillain: Near the end of the fourth film Wah Sing Ku is attempting to flee Riggs and Murtaugh with his brother, all the other villains having been killed. When Murtaugh shoots Ku's brother while aiming for Ku himself, Ku sticks around and tries to kill Riggs and Murtaugh in revenge. [[spoiler: Riggs then shoots Ku underwater after they fall off a pier while fighting.]]
* BadassBoast: Riggs has several throughout, but his DefiningCharacterMoment in the first film really hits this trope hard: "When I was 19, I did a guy in Laos from a thousand yards out. It was a rifle shot in high wind. Maybe eight or even ten guys in the world could have made that shot. It's the only thing I was ever good at."
* BashBrothers: Riggs and Murtaugh don't embody this trope until the final fight against Ku in the fourth movie.
* BeamMeUpScotty: Inverted. Murtaugh's {{catch phrase}} is "I'm too old for this shit", not "I'm ''getting'' too old for this shit", but he says the latter in ''Lethal Weapon 3''.
* BlondGuysAreEvil: Mr. Joshua in the first film, and the South Africans in the second.
* BombproofAppliance: A bathtub. The MythBusters eventually tested this as in the scene, and aside from the detonation method, it all worked exactly as advertised.
* BondOneLiner: From the second film: "Nailed 'em both." Also, the one in the next entry.
* BoomHeadshot: Roger's signature maneuver, done once a film, after rolling his head from side-to-side to crack his neck.
** How Roger takes care of the driver of [[spoiler: General McAllister's car.]]
** After Arjen claims "[[DiplomaticImpunity Diplomatic immunity]]", Murtagh puts a bullet in his head.
-->'''Murtaugh:''' [[BondOneLiner It's just been revoked.]]
* {{Bowdlerize}}: The films are played quite frequently on TNT and TBS, which are infamous for censoring language in films. For someone who's familiar with the theatrical version of the first film, watching it on one of these networks can be quite hilarious for that very reason. Unfortunately, sometimes the censorship seems unnecessary and arbitrary-- like when they cut out Riggs punching the guy on the hood of the car in ''Lethal Weapon 3'' after asking if he was all right.
* BrickJoke: [[ChekhovsGun Chekhov's Nailgun]] has a longer run than you'd expect. In the third film, it reminds Murtaugh, who is trying to sell his house, that he ''forgot to get permits to repair his blown-up house!''
** After Murtaugh's daughter appears in a condom advertisement, Murtaugh bemoans how his police colleagues will be planting condoms wherever he goes. [[spoiler:That night Murtaugh and his family are attacked in their home and no-one is interested in playing jokes on him...until later on in the movie when Murtaugh shoos away some cops crowding around his desk only to find they've planted a 'rubber tree' there. Even Murtaugh can't help breaking down in laughter.]]
* BunnyEarsLawyer: Martin Riggs.
* [[BuddyCopShow Buddy Cop Film]]
* CallForward: The musical riffs we first hear in the original film are later used in Sting and Eric Clapton's "It's Probably Me", the hit single from the third film.
* CareerBuildingBlunder: After the third film, where Riggs and Murtaugh were busted down to patrolmen for messing with the bomb squad's job (and blowing up a building), the fourth film has the department unable to get their insurance renewed due to the propensity of the duo causing catastrophic damage in their escapades. But since they can't be demoted off the streets, the department decides to ''promote'' them, fully ''two'' steps, bypassing Lieutenant and making them both Captains, at least until the insurance is renewed, in an attempt to get them off the streets. ''It does not work''.
* CareerResurrection: The original was one for Gary Busey.
* CatchPhrase: Most famously Murtaugh's "I'm too old for this shit," as well as his "Go spit, Riggs!"
** Leo has one as well: "OK, OK, OK..."
*** Ku, from the fourth film: "If this was Hong Kong, you'd be dead."
* TheCavalryArrivesLate: The end of the second film.
** The SWAT team arriving about a minute or so after Riggs shoots the playground sniper near the beginning of the first film.
*** This scene was (wisely) cut from the theatrical release and reinserted for the DirectorsCut DVD.
** Subverted in the third film, where Riggs argues that [[LampshadeHanging the bomb squad never gets here on time]]!"; they meddle with the bomb, it goes off, a massive building is levelled... and the bomb squad immediately pulls up, having arrived in plenty of time to deal with the bomb had Riggs not interfered.
* CementShoes: In ''Lethal Weapon 3'', Travis shoves a {{Mook}} who [[YouHaveFailedMe has failed him]] into a foundation and has cement poured over him. Quoth Travis: "[[BondOneLiner Now we have a relationship we can build on!]]"
* CharacterDevelopment: Riggs starts off as a suicidal, lonely man and at the end of the fourth movie is shown to be a happy member of a large family.
* [[ChekhovsGun Chekhov's]] [[IncrediblyLamePun Nailgun]]: In ''Lethal Weapon 2.''
** [[ChekhovsGun Chekhov's]] [[IncrediblyLamePun Dog Biscuits]] for AngryGuardDog, for that matter
*** [[ChekhovsSkill Chekhov's]] [[OverlyLongGag Dislocated Shoulder]] which keeps coming back. In the second film, Riggs voluntarily dislocating his shoulder to get out of a straitjacket on a bet is used comedically to show how nuts he is. But [[spoiler: when the villains try to kill him by putting him in a straitjacket and tossing him into a river, he's able to get out of it, swim up to the surface, and take out two of them.]]
** During the fight with Wah Sing Ku, after he dislocated Riggs' shoulder, Riggs gives him a short but brutal NoHoldsBarredBeatdown.
*** He also has to reset his shoulder twice in the third film, though not under such mortal circumstances. At one point, he slides himself into a pole to do so on the fly.
* ChekhovsSkill: Riggs ability to dislocate and reset his shoulder was used as a gag early in the second movie, only to become important to Riggs escaping a death trap. Similarly, in the third movie Riggs taught Murtaugh a basic defensive kick which was made into a prank with Murtaugh kicking over a water cooler, with Murtaugh used instinctively in the climax.
* ColdBloodedTorture: Riggs and Murtaugh are both subjected to this in the first film, as the bad guys try to find out from them what the police know. It doesn't work, because the cops don't know much of ''anything,'' and because Riggs is able to escape from Endo and go on a rampage.
* CombatPragmatist: Despite being a highly trained martial artist, Riggs isn't against [[GroinAttack groin attacks]], unsing improvised weaponry, dropping a crate on a man, or killing him with a machine gun when it becomes clear he's not going to win a fist fight.
* ComicallyMissingThePoint: From ''Lethal Weapon 3:''
--> '''Murtaugh:''' When are you gonna learn you can't solve every problem with your fists?
--> '''Riggs:''' Well, I couldn't use my gun; there was a crowd.
* ContinuityNod: Many scenes from previous films are mentioned throughout the series. Perhaps the funniest continuity nod is in ''Lethal Weapon 3'', in which Leo serves a realty agent trying to help Roger sell his house. Because of full disclosure issues, when the prospective buyers mention that they love the picture window, he says it's recently been replaced because a drug dealer crashed his car through it and shot the entire place up. (A reference to the first film, but see below). Then he has to mention the damage that happened in ''Lethal Weapon 2'':
--> '''Leo Getz:''' The bathroom upstairs has been completely remodeled due to unexpected bomb damage.
** Granted the thing with the picture window happened before Leo knew Riggs and Murtaugh, and therefore he may have been told a different story from what really happened-- but [[spoiler:it was the ''good guys'' who actually drove the car through the window]] in the first film.
*** FridgeBrilliance: Murtaugh would probably have spun the story that way to the insurance company.
** Also, Riggs and Lorna flirting in the third film, Riggs mentions a 'whole family of .44s on the back' from where [[spoiler: Arjen Rudd shot him at the end of LW2]] and he also mentions [[spoiler: the knife Vorstedt got him with in the leg at the climax.]]
* CrazyPrepared: Not so much crazy as it was clever, but Lorna managed to survive a potentially fatal cop-killer bullet wound by wearing ''two'' {{Bullet Proof Vest}}s just in case.
* TheDanza: Delores Hall plays Delores in ''Lethal Weapon 3''.
* DiplomaticImpunity: [[strike:Arjen]] Aryan Rudd claims diplomatic immunity to make the heroes back off in the second movie. (Although in fact, he was only a consular officer, and they get a lower grade of immunity - unless he had some other official status as well, he could have been searched provided proper procedures were followed.)
** For extra ballsiness, at one point he does this while SHOOTING at Riggs.
*** And Murtaugh [[CrowningMomentOfAwesome revokes it a second later.]]
* TheDragon: Typically opposing Riggs. Mr. Joshua in the first, Pieter in the second.
* DragonTheirFeet: In the first film, [[spoiler:while General [=McAllister=] was barbecuing his nuts on Hollywood Boulevard, Mr. Joshua went to Murtaugh's house to go after Roger's family. But there was "nobody here but us good guys".]]
* DrivenToSuicide: The first film ''opens'' with one, as [[spoiler: young Amanda jumps off a balcony]].
* EarnYourHappyEnding: Every movie but the second, which is decidedly more [[BittersweetEnding bittersweet.]]
* ElNinoIsSpanishForTheNino: In the fourth film, when Riggs, Murtaugh, and Butters seek to question Uncle Benny at a dentist's office, they give him a dose of laughing gas to make him more complacent, except they give him too much gas, making him way too aloof and carefree to be very helpful. His one clue as to the location of the Hongs is "Yao Mihn Bi". When asked what that means, Uncle Benny explains, "'Yao Mihn Bi' means... 'Yao Mihn Bi'."
* EvilAlbino: Mr. Joshua.
* EvilBrit: Jack Travis in the third movie.
* EvilCounterpart: Mr. Joshua again.
* FridgeBrilliance: One instance actually happens in-universe, and is not trivia.
-->'''Roger Murtaugh''': You ever hear of Ebony Clarke?
-->'''Martin Riggs''': Yeah, she writes those cheesy sex novels... why? You boinkin' her?
-->'''Roger Murtaugh''': No I'm not boinkin' her, Trish is Ebony Clarke.
-->'''Martin Riggs''': So you ''are'' boinkin' her.
-->'''Roger Murtaugh''': [''big grin''] Yeah, Yeah I'm boinkin' her!
* EvilVersusEvil: The Corrupt Chinese general's men vs. The Chinese Triads. As Riggs said "Let them kill each other."
* FollowTheLeader: The series spawned a ''lot'' of buddy-cop films.
* {{Foreshadowing}}: In the first film, there's a magnet on the Murtaughs' refrigerator that says something to the effect of "End apartheid in South Africa." Guess who the villains of the second film are?
* FromTheMouthsOfBabes: The six-year-old witnesses to [[spoiler:Dixie's house being bombed]] in the first film. "You're gonna bust Dixie! You're gonna bust Dixie!" Later, [[spoiler:after the bombing]]: "My Mom says policemen shoot black people!" Mel Gibson looked like he was legitimately cracking up in that scene.
* GenreSavvy: Subverted hilariously. In the third film, Riggs insists that he and Murtaugh go into the parking garage to try and defuse the bomb because "the bomb squad never gets there on time", as if that's a truism he's learned from experience or possibly from watching too many movies. After Riggs screws it up ("GRAB THE CAT!"), the bomb squad arrives seconds later. They would have had more than enough time to defuse the bomb if not for Riggs. They give him a sarcastic round of applause, too.
** Played straight by Murtaugh in the same scene, who argues against messing with the bomb because he's only eight days from retirement and he doesn't want to do anything stupid.
** Played straight in the first film by the bus driver whose car collides with [=McAllister's=]. He quickly backs the bus back several yards, [[spoiler:just in case the car were to explode.]] Smart man.
* GilliganCut: Murtaugh, stuck on the toilet, begs Riggs to keep his call to the bomb squad discrete. Guess what happens instead?
* GiveMeASword: Murtaugh tosses Riggs a nightstick in the fight with Mr. Joshua near the end of the first film, in response to the latter using a pole against him.
* GonnaNeedABiggerWarrant: The crimes always end up being more complex and involved than they appear on the surface.
* GoodCopBadCop: Almost immediately after meeting Leo Getz in ''Lethal Weapon 2,'' Riggs tells him to shut up. Getz says, "Oh, I get it-- good cop, bad cop." Then Murtaugh ''also'' tells him to shut up. "Okay... ''bad'' cop, bad cop."
* GoodIsNotDumb: After Riggs is blown through a window by a shotgun in the first film (he was wearing his bulletproof vest, so he didn't die), he points out to Murtaugh that now the police have the advantage, because the bad guys think Riggs is dead. Sure enough, Mr. Joshua calls the police station for information about the shooting, claiming to be a news reporter. The officer who picks up confirms that Riggs is dead, and it never occurs to [=McAllister=] and Joshua that the police could be deceiving them.
* GoofyPrintUnderwear: Murtaugh from 4; when directed by Riggs to strip to his boxer shorts to distract a madman wielding a flamethrower, Riggs asks with a laugh "Are those little hearts?"
* GunsDoNotWorkThatWay: The idea that "cop killer" bullets are an option for normal pistol calibers is nonsense. By the time you've juiced up, say, a regular 9mm with a sufficiently hardened bullet (just being pointy won't cut it) and enough propellant to punch through thick steel or kevlar, you'd need to create a special gun to fire it, because you've just invented an entirely new cartridge. Best to just chalk the whole mess up to RuleOfCool.
** Very, very minor truth in television with the Russian [=GSh=]-18 pistol, which is designed for just such an overpressure 9x19mm round. The timing's off, though, having entered service a full 20 years after the third movie. Even then, using said round in a weapon chambered for 9x19mm Luger will quickly ruin the gun, so the original point stands.
** Actually 9mm Parabellum round gives pretty high maximum pressure, so overpressurized load complete with hardened and specifically shaped (or saboted) round could easily defeat an ordinary kevlar vest. On the other hand, using such ammo in the ordinary SMG set to full auto would be extremely dangerous to the shooter.
* HairTriggerTemper: Averted; Joe Pesci is famous for such roles played scarily straight but his character Leo Getz is harmless. In fact, he plays a fall guy. He's still liable to fly off the handle at the slightest provocation, but everyone's more than aware it's all bluster and Riggs and Murtagh are more than willing to tell him to shut up.
* HeavilyArmoredMook: The flamethrower and machinegun wielding lunatic at the start of the fourth movie.
* HeroicBSOD: In the second film, when TheDragon [[spoiler: reveals he killed Riggs' wife Victoria, and then he kills Rika, too.]]
** In the third film, Murtaugh [[DrowningMySorrows goes on a drinking binge]] after he was forced to kill a teenager (who was a friend of his son's). In a RoleReversal, Riggs has to play the sane man in the entire episode.
** [[HesBack He's Back]]: And when he recovers from it, and is told by said teenager's mourning parents to "get the man who put the gun in [their] son's hands" ... [[TheAtoner oh boy, is he back.]]
* HeterosexualLifePartners: Riggs & Murtaugh. But bordering on HoYay; arguably, ''deep'' within HoYay territory.
-->'''Riggs''': You're the only family I've got! I've got three beautiful kids, I love them, they're yours. Trish does my laundry, I live in your icebox, I live in your life!
* HeyItsThatGuy[=/=]CaliforniaDoubling: The guy who says "Bravo" after the first building was blown up in the third film? None other than Bill Frederick, then the mayor of Orlando, Florida. The building used was Orlando's old City Hall building. Those familiar with the city will also recognize the [=SunTrust=] Center, the Orlando Utilities Commission building, and the new/current City Hall (which had a Coca-Cola sign planted on it). You can even make out a TV van from local ABC affiliate WFTV during the implosion.
** The building imploded post-credits was in St. Petersburg, Florida.
* HoistByHisOwnPetard:
** The fact that [[spoiler:General Mc Allister has explosives in his car enables Roger to kill him (by killing his driver, causing an overturned-vehicle crash)]] in the first film.
** Riggs [[spoiler:stabs [[TheDragon Vorstedt]] with his own knife]] in the second film.
** Riggs [[spoiler: kills Travis with a gun modified with cop-killer bullets (which Travis helped put back on the streets to begin with)]] in the third film.
*** And it is in fact the ''very same gun'' used by the boy Murtaugh shot. Which Travis stole from LAPD impound and sold to the boy in the first place.
* HotAmazon: Lorna Cole.
* HotPursuit: Played straight to the point of parody to the point of subversion back around to straight, all in record time.
* IdiotBall: ''"Wow, good thing we escaped your evil employers who just tried to kill us, Miss Van den Haas. Now let's drop you off at your apartment, where they know you live, without any police protection!"'' *hands ball to her* ''"Hey, great idea, Officer Riggs!"''
** Also Arjen Rudd in the second movie. Near the end of the movie he starts to shoot at the policemen and claims [[DiplomaticImpunity diplomatic immunity]] that can protect one from being arrested but not, you know, from being shot in self defense. Should he refrained from shooting, the protagonists could have done nothing without provoking major international incident.
* ImprobableAimingSkills: Riggs pulls off some incredible shots. Sure, Murtaugh has his share, but Riggs was breast-fed on this trope. The sniper in the school, being able to shoot a smiley-face on the firing range, being able to ''successfully hit a helicopter God knows how many yards away'', etc. all with a pistol. And then picking off Shadow Company mooks like flies. And that's just the ''first film''.
** In part 2, how about fatally shooting the pilot of a helicopter in the dark from about 100 yards away. With a pistol.
** The "have-a-nice-day" moment in the first film. Murtaugh [[LampshadeHanging lampshades]] Riggs' improbable aiming skills perfectly:
---> '''Murtaugh''' ''[re: Riggs' gun]:'' You sleep with that thing under your ''pillow'' or something?
---> '''Riggs:''' [[MarriedToTheJob I would]] [[TheInsomniac if I]] ''slept.''
** When Roger rolls his head from side-to-side and cracks his neck, watch out.
** As for Murtaugh, he pulls off an excellent shot to kill the BigBad of both parts 1 and 2. In part 1, he shoots the driver of a car coming right at him, and then gets out of the way as the out-of-control car goes flying onto Hollywood Boulevard and smashes into a bus. And in part 2, he revokes Rudd's diplomatic immunity with a damned impressive head shot.
*** In fact, in part 2, Murtaugh not only scores a head shot on Rudd, but the bullet ''goes through Rudd's photo on his diplomat ID.'' Making it, in fact, ''two [[StealthPun headshots]] with one bullet.'' [[RuleOfCool Yeah.]]
** Funny enough, it's {{averted}} completely in the third film--where Murtaugh has to ventilate a shed to get Darryl, then uses a machine gun on Jack Travis--and {{deconstructed}} in the fourth, where Wah dodges the shot--only for it to hit and kill his brother.
* InterruptedSuicide
* ItsPersonal: Each movie eventually turns into this. Riggs even says the trope by name in part 2.
* JustHereForGodzilla: For people familiar with Hong Kong kung fu movies, this may be their reason for going to see the fourth instalment.
* KickedUpstairs: Riggs and Murtaugh are both promoted to Captain in the fourth film, in the hopes that giving them desk jobs will cut down on the destruction they cause in the city. It doesn't work.
* LargeHam: Riggs, expecially in the first movie.
---> '''Riggs:''' Do you really wanna jump ?! DO YOU WANNA?!? Alright, then, let's do it!
* LethalChef: Trish Murtaugh.
* LightningBruiser: Riggs of the hard hitting fast guy type.
** Pretty [[DeconstructedTrope deconstructed]] in the fourth movie, when his age takes away the 'lightning part'. He's still faster and a better fighter than Murtaugh, but his age showing in his fighting prowess is a major plot-point.
* MakeItLookLikeAnAccident: Parodied in the third film. After Riggs and Murtaugh are busted down to patrolmen, they catch a guy jaywalking; when they say they're gonna cite him for it, the jaywalker is apoplectic. "You've got people actually committing crimes in this city, and you're busting me for crossing the street?" Eventually, he gets on Riggs' nerves to the point where he's about to pull his gun on him. "Lemme shoot him, Roger! We can make it look like suicide!" After the jaywalker takes off on Roger's advice ("Get out of here before my partner kills you! No, not ''that'' way, the ''other'' way!"), Riggs and Murtaugh both laugh their asses off-- they were only having a little fun with the guy, apparently.
* MauveShirt: All the new detectives introduced in the second movie.
** The 22-year-old cop, Edwards, who's the butt of jokes at his expense about his age and height throughout the third film, and takes it all with good-natured, innocent charm. He ends up dead at the hands of Jack Travis.
* MeaningfulName: Leo tries to make this work for him. (And mostly just ends up annoying people.)
--> '''Leo Getz:''' My name's Leo Getz. Whatever you want, Leo gets. Get it?!
* MistakenForGay: Butters was ''trying'' to be nice to his [[spoiler: father-in-law.]]
* MoodDissonance: There's a tense scene in the first film in which Riggs prepares to blow his own head off-- while a ''Looney Tunes'' Christmas special is playing.
* NailEm: Murtaugh is attacked by South African agents and defends himself with a nail gun in ''Lethal Weapon 2''.
* NeckSnap: Riggs does this a lot.
* NoCelebritiesWereHarmed: The hockey teams playing at the Forum in ''Lethal Weapon 3'' were obviously meant to be the Los Angeles Kings and the Toronto Maple Leafs. The colors are just about identical. Look closely enough at the right time, though, and you'll see they're wearing generic uniforms.
** If you pay attention, the film actually features stock footage of the Los Angeles Kings and the Toronto Maple Leafs. They apparently couldn't get rights to use at least real NHL uniforms for the scenes they filmed.
* OddCouple: Riggs and Murtaugh, naturally!
* OhCrap: From the third film:
--> '''Riggs:''' Roger?
--> '''Murtaugh:''' Yeah?
--> '''Riggs:''' ''Grab the cat!''
** Possibly literally in the second film, when Murtaugh realizes that [[spoiler:the toilet he is sitting on is rigged to explode with a dead man's switch]].
* OldCopYoungCop
* OlderHeroVsYoungerVillain: A brutal example in the third film. Possible {{Deconstruction}}, definite TearJerker.
** Also in the fourth film with Wah Sing Ku who is younger than both Riggs and Murtaugh and very skilled in a deadly form of martial arts.
* OneSceneWonder: The pyromaniac in the beginning of the fourth film.
* OneManArmy: Riggs for the first three films, untl his age finally catches up to him in 4. In all fairness, the only guy he has trouble with in 4 is Jet Li's character.
* OverlyLongGag: The target takes a ''long'' time to get to the end of the range, and a ''long'' time to come back.
* PapaWolf: Murtaugh is ''fiercely'' protective of his family, but particularly his daughter Rianne. He even punches Riggs right in the face (and overboard) after Riggs says "I think I may have slept with someone I shouldn't have," leading Murtaugh to assume he was talking about Rianne. [[spoiler:He was talking about Lorna.]] Granted, he was drunk at the time.
** This is the culmination of three films worth of tension. Murtaugh has always been protective of Rianne, and has worried that Riggs might "go for her".
* PetTheDog: Literally. Riggs went from AxCrazy DeathSeeker to [[BunnyEarsLawyer Bunny Ears Cop]] when he chose to make friends with a guard dog instead of shooting him.
** He justifies it by saying that, while he's okay with shooting people, he's unable to shoot a dog. This probably would've been in effect even in the first movie.
** In the first film, Riggs gives an ''adorable'' prostitute $100 just to come home and watch television with him.
* PlatonicProstitution
* PluckyComicRelief: Leo Getz in all movies after the first, but manages to stay out of [[TheScrappy Scrappy]] territory because Riggs and Murtagh annoy him just as much as he annoys them.
* PoliticallyIncorrectVillain: The South Africans from the second film. What else would you expect from diplomats of the country that named Apartheid?
* ProductPlacement: From the first film:
--> '''Joshua:''' ''[while jacking a car]'' Mind if I test-drive your Audi?
* PreMortemOneLiner: Non-verbal version; after putting a bomb in Murtaugh's [[RefugeInAudacity toilet]], the bad guys wrote "boom" on the toiler paper.
* ThePurge: [[spoiler: The villain in Lethal Weapon 2 does this to the LAPD detectives investigating him, with Riggs and Murtaugh the only survivors.]]
* PsychoForHire: Mr Joshua.
* RealityIsUnrealistic: The {{Mythbusters}} tested the scene in the second film where Riggs and Murtaugh survive the toilet bomb by diving into the tub with a bomb blanket. The method would have worked, however, it was found that spraying the bomb with nitrogen would have given the characters a full fifteen minutes to walk out of the house, and diving into the tub wasn't necessary.
* RedemptionQuest: The entire series is one for Riggs. Murtaugh had his in the third movie [[spoiler:after killing a teenager in self-defence.]]
* RefugeInAudacity: Riggs with the suicide jumper in the first film. He was crazier than the jumper.
-->'''Martin Riggs:''' ''"'''DO YOU REALLY WANNA JUMP?''' Do you WANNA? Alright, then, let's do it!"''
** Riggs ''is'' this trope. His signal [[spoiler: for Murtaugh to go into the stilt house and start shooting the bad guys]] is to use his pickup truck to [[spoiler: start bringing the whole ''place'' down.]]
--> '''Murtaugh:''' Hey... what's your signal?
--> '''Riggs:''' You'll know it when it happens.
--> '''Murtaugh:''' ''[sighs]'' Somehow, I think I ''will'' know.
** In the third film, Riggs follows Travis out of the subway station by ''riding on the front of the subway car.''
* {{Retirony}}: Subverted. Early on in ''Lethal Weapon 3'', Murtaugh's wife shoves a bulletproof vest on him, to make sure he always wears it.
-->'''Roger Murtaugh:''' She loves me.
* {{Roaring Rampage of Revenge}}: Riggs in the second movie, when he [[spoiler: finds out that the South Africans killed his wife and his current girlfriend]]. Good thing Murtaugh was there...
** Not quite as vicious, but when Murtaugh returns after Darryl's funeral in the third movie, he goes person-to-person shaking people down to trace his gun. At the first one's house, the home of one of Darryl's homeys, he rants about how gang-banging is tantamount to self-genocide for their race.
* RunningGag: Getz's various "They fuck you with/at ___" rants, which even sparked a bizarre bonding moment between him and Butters, who previously had met in very bad terms. [[CrowningMomentOfFunny Butters was confused after their cooperative rant]].
** In the second film, Riggs and Murtaugh are always telling Leo to stay in the car, which he almost always ignores. [[spoiler: The one time he does what he's told, two bad guys commandeer the vehicle and kidnap him.]]
** Trish's [[CordonBleughChef bad cooking]] is frequently referenced throughout the series, including a great exchange where Roger wishes the toilet-bomb had instead been put in the kitchen stove. Riggs responds with [[CrowningMomentOfFunny "All the needless suffering could've been ended right there."]]
** "Hey guys, can I have a gun this time?" "''No''."
* RuthlessForeignGangsters: Wah Sing Ku and the Triads in the fourth movie.
** Arjen Rudd and the South African mobsters in the second one.
* SarcasticClapping: The bomb squad in the third (see TheCavalryArrivesLate).
* SaltAndPepper
* ScarSurvey: The scene where Cole and Riggs strip down to show off their scars.
* ShootEverythingThatMoves: Riggs tells Murtaugh the plan for rescuing Leo in the second movie:
-->'''Murtaugh:''' What's the plan?
-->'''Riggs:''' Wait for my signal, then just go in and shoot those fuckers.
* ShootingGallery: In the first movie, recently-teamed partners Riggs and Murtaugh are trying to one-up each other on the range. Murtaugh, annoyed at Rigg's tight bullethole group, sends a target further down the range and puts a single bullet through its 'head'. Riggs then sends his target all the way downrange, and shoots a smiley face in the head zone.
-->'''Riggs:''' Have a nice day.
* StayingAlive
* StealthParody: These movies are [[GenreSavvy more than aware of the genre they inhabit]], which many people don't catch. RogerEbert said that the main problem with the movie parody ''Loaded Weapon 1'' was that it was trying to make fun of a movie series that featured an exploding toilet.
* StealthPun: In the second film, when Murtaugh and Riggs are sitting in the bathroom and Roger is worried he's going to die on the toilet. After Riggs tells him that guys like him don't die on toilets, he adds:
-->'''Riggs:''' Besides, I'm here, and I have no plans on going right now.
* StuffedInTheFridge: The original plan for Rika in the second movie was for her to survive and attend the Thanksgiving party at Murtaugh's house with Riggs. Instead, she was killed off just so Riggs would be properly "motivated" for the rest of the movie.
* SuperSpeed: In the 4th movie they had to get JetLi to slow his fight scenes down because he was too fast for the actors to react to ''and the camera to catch on film.''
* SurvivalMantra: "We're not too old for this shit... we're not too old for this shit..."
* SuspiciouslySpecificDenial: In ''Lethal Weapon 3'', Riggs gets ahold of one of Jack Travis' flunkies at the garage in which he works, asking him "where's your buddy Travis?" After Lorna is waylaid by five other guys (and beats the crap out of them) while Riggs, Murtaugh and the original suspect watch, Riggs again asks the suspect where Travis is. "I told you, I don't know a Jack Travis." "I didn't say his name was ''Jack.''"
* TakeThat: ''Lethal Weapon 4'' contains some shockingly unsubtle jabs against the NRA. A bit hypocritical coming from a series that elevated [[IJustShotMarvinInTheFace dangerous and irresponsible gunplay]] to an art form.
* TemptingFate: In the first film. "There's no more heroes left in the world." Cue Riggs' BigDamnHeroes moment.
* TheyFightCrime
* TitleDrop: Done in the first film.
--> '''Murtaugh:''' File also said you're heavy into martial arts, T'ai Chi and all that killer stuff. I suppose we have to register you as a lethal weapon.
* TragicKeepsake: Murtaugh finds the watch he gave to the elderly Asian immigrant he befriended...
* TropeMaker
* UncleTomFoolery: Lee Butters.
* UnusuallyUninterestingSight: In the first film: When Riggs, Murtaugh and Lianne escape from the boiler room, they make their way to the main room of a nightclub. A guy holding a gun turns to face them and Riggs shoots and kills him almost instantly. It's very loud. ''No one seems to notice.'' He kills two more people in the nightclub, and no one reacts until the third kill.
** Earlier in the first film, this is averted when Hunsacker screams at Murtaugh to ''"KILL THEM! JUST KILL THEM!"'' Several people in the background briefly look in his direction.
* VaporTrail
* VillainousValour: Only Wah Sing Ku is able to disasemble a Beretta in 5 seconds with his own bare hands and then knocking off Riggs and Murtaugh who are older and taller than him. In the final showdown he once again manages to handle them even if they are two vs one.
* VisualPun: The "rubber" tree in ''Lethal Weapon 2''.
* VitriolicBestBuds: Riggs and Murtaugh may well be the Trope Codifiers.
* WireDilemma: Occurs in the third movie... and the bomb goes off.
* YouHaveFailedMe: In the second movie, after Rudd's henchman Hans loses a million dollars worth of gold Krugerrands, Rudd has him executed.
** He would've just killed the entire South African government, and [[DiplomaticImpunity gotten away with it because of diplomatic immunity]].
** Echoed in a scene later on, when [[TheDragon Pieter Vorstedt]] meets Rudd in his office. Rudd notices he seems to be looking at the floor, and then asks him what he's doing.
-->[[CrowningMomentOfFunny "I am just checking to make sure I am not standing on plastic."]]
** In the third film, the BigBad, Jack Travis, does this to ''both'' guys who attempted the armored car robbery, because they were "going into business for themselves" and running the risk of screwing up the entire operation. He has one of them [[CementShoes drowned in cement and left to be paved over]], and then goes into an interrogation room and shoots the other one in the head.
* YouJustRuinedTheShot: Riggs tries to save Rianne from what he thinks is a hostage situation, but turns out to be a scene in the movie she's in.
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