Lethal Weapon 4 (1998) Poster


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Richard Donner asked Jet Li to slow down during action sequences because he was moving faster then the camera shutter speed, and it wasn't registering on film.
Murtaugh's children are played by the same actors and actresses in all four Lethal Weapons.
Roger Murtaugh's (Danny Glover) line of "I'm too old for this shit!" has made its way into every Lethal Weapon movie. Only this time, Riggs amends it to "We're not too old for this shit!" as a sign of defying their ages.
Not only was this Jet Li's first American-produced movie, it was also the first time he'd ever played a villain.
The only 'Lethal Weapon' in which Riggs is not seen smoking. He was kicking the habit during the third one, and it is presumed that he kicked the habit by the time the fourth one began.
Jackie Chan was considered for the role of Wah Sing Ku, but turned it down, because he chooses never to play the villain in a movie.
When Martin and Lorna were having the discussion about her hearing a rumor that Murtaugh was "on the take." Martin jokingly said "I've tried to convince him to take money." In Lethal Weapon 2 (1989) when they were both trapped in a storage container filled with the drug dealers' money, Martin did try to convince him to take some of the money and do something good with it.
Paul Tuerpe appears in all four Lethal Weapon movies, but always in slightly different roles. He played 'Mercenary' in the first, 'Hitman' in the second, 'Henchman #3' in the third, and 'Helicoptor Co-pilot' in the fourth.
The name of the police psychiatrist, who appeared also in the former three Lethal Weapon movies, is finally revealed in this movie - Dr. Stephanie Woods.
Murtaugh's boat is named "Code 7" which is the LAPD radio code for a meal break.
The car chase and fight between Riggs and the Chinese man in the house trailer was filmed on the 215 freeway in Las Vegas. Apparently, they couldn't get filming permission anywhere, but the Las Vegas mayor was very accommodating. All drivers were either stunt drivers or members of Bill Young's Driving Team.
The ending was still being written while the movie was in production.
Jeffrey Boam's script was built around neo-Nazi activity in the US. Interviewed after its release, he remarked that he thought the counterfeiting of Chinese money was hardly a matter to create the suspense appropriate to a Lethal film.
Body count: 30
Started filming in January, seven months before its release date. The shoot ended exactly 33 days before the release date. According to editor Frank J. Urioste, to meet the deadlines he had to use Avid, even though he had never edited a whole movie using digital technology before.
Chris Tucker, Will Smith, Eddie Murphy, and Larenz Tate were considered for the role of Lee Butters.
The film's screenplay was in flux all the way from development through the entire production schedule. Channing Gibson, who took on primary scripting duties due to his longstanding work history with producer Joel Silver, was a successful TV writer who was looking forward to the more relaxed pace of screenwriting, ended up going through more revisions than any TV show he'd worked on. Amongst other things, the character of Lee Butters was not in the original script, and hastily enhanced when Chris Rock signed on, and Joe Pesci's Leo Getz wasn't slated to be part of the film until Richard Donner and Silver recruited Pesci to reprise his role.
Only 'Lethal Weapon' film not to feature any scenes in Murtaugh's bathroom. The first one had the birthday cake scene in the beginning. The second one had the toilet bomb scene. The third one had the retirement cake scene toward the end.
Eight actors have played the same characters in all four Lethal Weapon films. Aside from Mel Gibson and Danny Glover as Riggs and Murtaugh, respectively, Darlene Love plays Murtaugh's wife, Traci Wolfe, Damon Hines, and Ebonie Smith are Murtaugh's kids, Steve Kahan is Captain Murphy, and Mary Ellen Trainor plays Dr. Woods, the police psychiatrist. In a way, Riggs' dog, Sam is the ninth regular character. He appears in Lethal Weapons 1, 2 and 4, and a deleted scene featuring him was reinstated for the director's cut of Lethal Weapon 3 (1992).
In the first movie, they decided not to let Danny Glover bare his chest because they felt it looked too good for a 50 year old. Now in this one he not only bared it, he strips down twice.
The only Lethal Weapon movie in which Mel Gibson doesn't sport a mullet haircut.
Warner Brothers decided during the scripting process that the only story line they wanted to do involved Chinese immigrants in some way. Several writers worked out of this basic outline, with Channing Gibson earning the assignment; the story elements involving the Triads and corrupt officials were added in once the film was green-lit.
Jeffrey Boam, who had written Lethal Weapon 2 (1989) and Lethal Weapon 3 (1992), wrote a completely original script which everyone at Warner Bros. had liked, but was not used.
In one scene, Riggs and Murtaugh congratulate one another on their promotions by rapidly alternating between handshakes and salutes. This is similar to scenes in Forever Young (1992) between Mel Gibson and George Wendt.
On the Beretta 92, a button on the right side of the frame must be pushed in to un-block the lever on the left side, which is rotated down 90 degrees, in order to release the slide so the weapon can be 'stripped' and cleaned. It is possible to grab the gun, push the tab down, and pull the slide off to disarm the weapon. When Wah Sing Ku pulls the slide off of Riggs' Beretta 92, the button has already been pushed down and the lever partly rotated.
Riggs's trailer is in the same place that Jim Rockford's trailer was during the majority of The Rockford Files (1974)'s run.
Kim Chan (Uncle Benny) says, "Bloody marvelous!" a catch-phrase often used by his character "The Ancient" in Kung Fu: The Legend Continues (1993).
Only movie of the 'Lethal Weapon' series that does not feature the chase theme. The chase theme was used in the first one during the Hollywood Boulevard chase scene when Riggs pursues Mr. Joshua. It was used in the second one during the pursuit of the stolen tow truck. It was used in the third one during the pursuit of Jack Travis at the hockey rink.
WILHELM SCREAM: At the beginning of the film when Riggs (Mel Gibson) shoots the man with the flamethrower, sending him flying into the gas station, a muffled Wilhelm scream can be heard.
Only film in the 'Lethal Weapon' series in which Riggs does not drive a GMC Sierra with dual rear wheels. In this film, Riggs drives a GMC Sierra with only 4 wheels total.
After being promoted, Riggs addresses Murtaugh with the words "O Captain my Captain", which is the title of a poem by Walt Whitman (and, of course, a reference to the Dead Poets Society (1989) where the phrase plays a central role.)
The final film in which composer Michael Kamen composed the music for producer Joel Silver. The other films he'd worked on with Silver were, Lethal Weapon (1987), Die Hard (1988), Road House (1989), Lethal Weapon 2 (1989), Die Hard 2 (1990), Hudson Hawk (1991), The Last Boy Scout (1991) (a film which Kamen and Silver themselves hated), Lethal Weapon 3 (1992), Assassins (1995), Fair Game (1995) (in which his music was rejected in both cases) and finally this film. Kamen would pass away from multiple sclerosis in 2003.
One of the Pontiac Grand Ams used in the film was on display at Warner Brothers Movie World, Gold Coast, Australia, for several years, before being auctioned off along with other items from the park in late 2012.
Promotional television ads and the theatrical trailer featured Chris Rock wearing a police uniform doing a comedy act (he is referring to himself as Riggs being cast with a different actor - himself). His character never wore a police uniform in the movie. During the photo album credits, a picture of him wearing the uniform can also be seen.
The second Lethal Weapon movie to feature the casting credits at the end of the movie, as opposed to the beginning. The first of the series to do this was Lethal Weapon 2 (1989). Both Lethal Weapon (1987) and Lethal Weapon 3 (1992) had their casting credits at the beginning of the movie.
Kim Chan also played a crime lord nicknamed Uncle Benny in The Corruptor (1999).
The second locomotive that strikes the bad guys' car in the second railroad crossing scene is the same former Alaskan Railroad GP7-type locomotive No.1804 which was at the front of the Grand Continental train in Under Siege 2: Dark Territory (1995). It has the same livery, with the Grand Continental names removed.
Danny Wynands has a role in all the Lethal Weapon films besides the first one.


The trivia item below may give away important plot points.

Originally, Mel Gibson insisted his character be killed off in the movie as he felt this should be the last Lethal Weapon movie. After filming was completed he retracted his statements, saying he had such fun making the movie he'd be happy to do another one. The film teased fans with his original statements by hinting he was going to die by drowning after the concrete slab fell on him while Murtaugh was still unconscious.

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