In Babe, the narrator highlights this conversation between Fly and the sheep.
Narrator: Fly decided to speak very slowly for it was a cold fact of nature that sheep were stupid and no one would ever persuade her otherwise.
A few seconds later
Narrator: The sheep spoke very slowly for it was a cold fact of nature that wolves were ignorant and nothing would convince them otherwise.
In Back to the Future, during Marty's visit to 1955 his down-filled orange vest from the 1980s is mistaken for a life preserver (which means he must be a sailor) by Doc, one of Biff's lackeys, the soda parlour guy, and Lorraine's mom.
In Benny & Joon, Sam makes grilled cheese using an iron. Benny observes that "For grilled cheese, I would have used the wool setting", to which Joon replies "That's what I told him!"
Perhaps the best known film example is "You'll shoot your eye out" from A Christmas Story. First said by Ralphie's mother; then written on his school report (convincing Ralphie that mom and the teacher were in cahoots); and, to add insult to injury, spoken by Santa himself! "Was there no end to the conspiracy of irrational prejudice against Red Ryder and his peacemaker?" And then Ralphie says it himself, at the end of the film.
Ralphie: Oh my god, I shot my eye out!
In David And The Elves, Santa Claus travels to Warsaw to search for Albert the Elf, and he insists on wearing a Paper-Thin Disguise of overalls, a t-shirt and a red toque, which he believes will make him look like a plumber. Subsequently, it becomes a Running Gag that minor characters immediately identify him as a plumber.
Invoked rather violently in The Departed: Billy Costigan is in a bar trying to get in with the mob. He orders a cranberry juice, whereupon the guy sitting next to him says its a diuretic and asks if he's on his period. Costigan smashes his mug against the guy's head and is about to beat the crap out of him before mob lieutenant Mr. French separates them. He asks what's he's drinking: "What, is it your period?" Later on, the head of mob Costello is sitting with Costigan and orders a drink. His beverage of choice? Cranberry juice.
Die Hard with a Vengeance has McClane and Zeus Carver successfully disarm a puzzle-bomb, after which they elect to hand it over to the authorities, to prevent some kid from picking it up. Unfortunately, Simon has fake cops stationed all over the place, and our heroes unknowingly hand the bomb over to them. Then the fake cops switch to their native German and agree to hold on to the bomb...because some kid might pick it up.
There's a Brick Joke in Easy A that uses this trope. Early in the film, Olive describes Huckleberry Finn as being about "a teenage boy who runs off with a big hulking black guy". Right near the end, a girl tells Olive that her gay friend Brandon...well, guess. It's made funnier by the fact that the black guy in question is of average build.
Ghost Dog: The Way of the Samurai does this (not always for comedy) with Ghost Dog and Remy — neither speak the other's language, but they are always talking about the same thing.
"I'm in love with your daughter and I have a newfound respect for life." [cut to other car] "That punk is either in love with that guy's daughter, or he has a newfound respect for life."
In Heathers, the psychotic J.D. plants a bottle of mineral water next to the two Jerk Jocks he just murdered to suggest that they died in a gay suicide pact. Veronica thinks the idea is completely stupid. Three guesses what the cops say when they find the bottle. Made even funnier in that they also planted a bag full of gay porn and sex toys next to the corpses, but the mineral water is the first thing the cops pick up.
In The Ipcress File, secret agent Harry Palmer is being sent away on attachment to Major Dalby's unit by his dour boss Colonel Ross. Before he goes Ross warns "Be careful with Major Dalby. He doesn't have my sense of humour". When he arrives, Major Dalby warns "Be careful with me. I don't have Colonel Ross's sense of humour".
When Paulie first is told about Juno's pregnancy, he at one point awkwardly sputters out a description of having a baby as something that happens "to our moms and teachers when they get pregnant". Later on, when a fellow jogger comes up to Paulie to talk to him about Juno's pregnancy, the other jogger also refers to her pregnant status as "like our moms and teachers".
There's the reiterated comment that having sex certainly wasn't Paulie's idea.
Long Shot: Both Fred and President Chambers, while discussing Chambers retirement from politics in order to make it in Hollywood, discuss how not many TV stars have made it big into films, are only able to name Woody Harrelson and George Clooney.
Used in Love Actually to show that Jamie (who only speaks English) and Aurelia (who only speaks Portuguese) are well matched. After a book manuscript flies into the lake they are both swimming to collect the paper and he says "I hope there aren't any eels, I hate eels," and she says, "Don't splash too much, you'll disturb the eels". When they get out, she suggests he should name a character after her and give her 50% of the profits, while he suggests that he should name a character after her and give her 5% of the profits.
Jamie: It's the happiest part of my day, driving you. Aurelia: It's the saddest part of my day, leaving you.
In Mallrats, Shannon remarks to Brodie while beating him up that he only acts like a nice guy to girls so that they'll let their guard down and allow him to "screw [them] in a very uncomfortable place" (meaning he wants to have anal sex with them). Brodie, not getting the euphemism, remarks "What, like the back seat of a Volkswagen?" Apparently, no one else gets it either, with T.S. and Gill Hicks reaching the same conclusion as Brodie. (When Gill says that, Brodie does a little Double Take, as if wondering "How did you know..?")
In Clerks II, Jason Lee has a cameo as a character Randal refers to as "Picklefucker" due to an unfortunate incident in high school. Lee's character claims Randal "must be the only one who still remembers that". Lee's character then gives his food to Jay, who responds with, "Thanks, Picklefucker!" The audience thinks this is a subversion, until Jay then runs outside screaming, "Yo! Some picklefucker just gave us free eats!" indicating that he had absolutely no idea who the character was. A trimmed portion has Randal asking "How did you know we called him Picklefucker?"; Jay responds, "You do?"
In The Martian, Mark Whatney at one point explains that Mars is under maritime laws and he is about to take a space craft without explicit permission, thus committing an act of piracy. Making him a Space Pirate. Running with this, he demands that NASA call him "Captain Blondebeard". Upon hearing this, Kapoor immediately thinks of the same laws.
In the climactic car chase in The Other Guys, Allan takes out a bad guy's car with a PIT Maneuver. When asked how he knows how to do it, he replies "Grand Theft Auto!" Behind them, in one of the other cars, Wesley muses "someone's been playing Grand Theft Auto"
When the bus breaks down in Paterson, three different people independently express fear of it "exploding into a fireball", nearly word-for-word.
Pee-Wee from Pee-wee's Big Adventure gets stranded in the wilderness and gets picked up by a truck driver named Large Marge. Just after they get going, Marge tells him of the worst accident she'd ever seen, describing the sound of the collision as sounding "like a garbage truck falling off the Empire State Building". After she drops him off at a diner, he tells them of his encounter. One of the patrons then goes on to tell him of the same accident, also describing the sound as "like a garbage truck falling off the Empire State Building" and revealing that Large Marge was the driver killed in the crash.
In The Santa Clause, Tim Allen's character reads his son "A Visit from St. Nicholas" and the boy mishears "arose such a clatter" as "a Rose Suchak ladder". Shortly thereafter they hear a noise and run outside to find a ladder leaning against the house, a sign hanging off one rung that reads "Rose Suchak Ladder Co."
In Sonic the Hedgehog 2 (2022), when Tom checks in on Sonic while he is in Hawaii for his sister-in-law's wedding, Sonic waves aside Tom's concerns with, "You're at the Four Seasons in Oahu! Have a mai tai! Spend some time with your wife!" Later on, when Tom is talking with Maddie and expresses his concerns again about Sonic, Maddie tells him almost the exact same thing, something Tom lampshades.
Spaceballs: Upon discovering that the combination to the air shield is "1, 2, 3, 4, 5", Dark Helmet says "That's the stupidest combination I've ever heard in my life! That's the kind of thing an idiot would have on his luggage!" President Skroob enters and, after he is told the combination, he says "That's amazing! I've got the same combination on my luggage!" (Shortly afterwards, he gives an order for someone to change the combination)
During one of the linking segments of The Ten, Gretchen is incredulous when Jeff refers to weightlifting as "juicing my pecs". Much later, there's a scene that involves one prisoner asking another to spot him as he lifts weights, which he also calls juicing his pecs. Of course, Jeff is supposed to be the one telling the stories that make up most of the movie...
