One of the few things played straight in Jay and Silent Bob Strike Back, and verging on parody. Jay's monkey is kidnapped and driven away in a van with a poster on the back that clearly shows its destination. After about 3 minutes of stupidity, "Silent" Bob is forced to set his friend straight.
Additionally, after Bob's tirade Jay is bothered more by getting spittle on him than the significance of Bob speaking for once.
That may have been just an attempt at saving face.
Which still doesn't answer Jay's question of why "Silent" Bob can bust out that whole long stupid Chasing Amy monologue at the slightest invitation but can't take two seconds to just SAY "Hey, I noticed a sign that indicated they might be going to Hollywood" instead of doing a big silly pantomime which could never have worked if Jay had happened to miss reading the sign before the car pulled away, so maybe it's Bob who missed the point.
Jay does this again in Dogma. When Rufus explains that Bethany is a descendant of Jesus due to the logical explanation that Joseph and Mary probably WOULD HAVE had more children and, thus, be related to him by blood in some way, all Jay got out of it was "So you mean Bethany's... part-black?"
Cannon Films had a major case of the trope when they wrote a Spider-Man film script, which would have been very In Name Only. Said script centered around Peter Parker getting kidnapped by a Mad Scientist (presumably Curt Connors/The Lizard) and being mutated into a spider/human hybrid creature. Understandably, Stan Lee was not pleased with this treatment and ordered a rewrite - just the start of a long Development Hell for the wall crawler.
In the movie Half Baked, Thurgood is telling his friends not to spend any money, as they have to save it. Then:
Zoolander. The eponymous character, observing a model of the school building he plans to open: "What is this? A center for ants?!"
Also the scene where the lead, a male model, reads a magazine with his picture on the front. The title reads, 'A Model Idiot.' Not getting the insult, the main character reads it as 'A Model, Idiot.'
Later in the story, Zoolander strikes a pose that saves a vital character from dying. When he is cheered on for his actions, he thinks it is because they noticed he turned left to do the pose. (Zoolander admitted that he was incapable of making left turns, and has to make a full right turn instead.)
Gulch: I want to see you and your wife right about Dorothy.
Henry: Dorothy? Well, what has Dorothy done?
Gulch: What's she done? I'm all but lame from the bite on my leg!
Henry: You mean she bit you?
Gulch: No, her dog!
Henry: Oh, she bit her dog, eh?
(Henry lets go of the gate and it hits Ms. Gulch from behind.)
Of course, given the type of person she was, it's probable he was simply Obfuscating Stupidity in an attempt to protect Dorothy.
In Kingpin, this happens twice. Once, he holds out his rubber hand to Ish, to show him is bowling championship ring and Ish comments on his hand. Later in Reno, he holds out his hand to demonstrate its fakeness and the guys he's showing think he's going on about the ring.
Three times, when he's signing up at the end and tries to put his ring up for collateral on his dues, the response is 'what am I supposed to do with a rubber hand'
Also, when Brian tells his unwanted followers "You are all individuals!" they all (but one) mindlessly repeat the statement in lockstep unison.
A similar situation occurs in Canadian Bacon. Sherriff Boomer, Kabral, and Roy Boy steal a truck and paint anti-Canadian graffiti on it. They later get pulled over by a Canadian highway patrolman because of it. However, it's not because the graffiti is anti-Canadian. It's because it's only in English and not also in French.
He then helpfully provides translations and the spray-can to do them with. Aren't Canadians just the nicest people?
Not only that, but the cop's expression as they drive away is priceless. He looks filled with national pride.
Dr. Evil of the Austin Powers films misses the point when Frau Farbissina tries telling him that she's pregnant.
Frau Farbissina: Herr Doktor, I'm late. Dr. Evil: No, you got here right on time. Frau Farbissina: No, I mean, I'm late.
The first film Lampshades this trope with a memorable exchange:
Vanessa Kensington: Mr. Powers...let me be perfectly clear with you, perhaps to the point of being insulting. I will never have sex with you, ever. If you were the last man on Earth and I was the last woman on Earth, and the future of the human race depended on our having sex simply for procreation, I still would not have sex with you. [Beat] Austin Powers: What's your point, Vanessa?
And later, in the same film:
Vanessa: You know, I sometimes forget youíve missed out on the last thirty years: the fall of the Berlin Wall, the first female British prime minister, the end of apartheid... Austin: Yeah, and I can't believe Liberace was gay. I mean, women loved him! I didnít see that one coming!
In Year One, Jack Black's character doesn't understand what lesbian means and gets into an awkward situation when he tries to sleep with one. She even tells him she likes to have sex with women and he stills doesn't get it. Admittedly he's just that stupid.
In Tremors 2 Earl throws a timebomb into the bed of a large army truck loaded with explosives, hoping it will kill the Shriekers trapped in the building in which the truck is parked. When he gets back outside and tells the truck's owner, Burt, what he has done:
Burt: That's two and half tons of high explosives, Earl! Earl: You mean that's not enough? Oh Burt, don't tell me it's not enough! Burt:Not enou... Never mind, just run! Run!
They're dealing with creatures that asexually reproduce exponentially when they eat too much, inside a warehouse full of snackfood and MREs in Burt's truck. Earl's worry is justified, as Burt is the only expert on explosives present in the movie.
More accurately, in the parts where Earl has to remind Grady to stay off the ground. And when the Graboid eats the radio.
Earl: You left the radio on the ground?! Grady: Sorry, I forgot...
Joe: What are you talking about? You can't marry Osgood. Jerry: Why, you think he's too old for me?
In Dumb and Dumber, Lloyd is with Mary, who he's infatuated with, and asks:
Lloyd: What do you think the chances are of a guy like you and a girl like me [sic]... ending up together? Mary: Well, Lloyd, that's difficult to say. I mean, we don't really... Lloyd: Hit me with it! Just give it to me straight! I came a long way just to see you, Mary. The least you can do is level with me. What are my chances? Mary: Not good. Lloyd: You mean, not good like one out of a hundred? Mary: I'd say more like... one out of a million. Lloyd: So you're telling me there's a chance? YEAH!
As Lloyd and Harry are on the road out of Colorado on foot, a bus pulls up filled with hot bikini girls and... Look, just read the exchange:
Bikini girl: Hey, guys. We're going on a national bikini tour and we're looking for two oil boys who can grease us up before each competition. Harry: You're in luck... There's a town about three miles that way. I'm sure you'll find a couple guys there. Bikini girl:(weirded out) Okay... Thanks. (the bus starts leaving) Lloyd:(upset at Harry) Do you realize what you've done?! (starts running after the bus) Hey! Wait! (the bus stops as they get to the door) Lloyd: Y-you'll have to excuse my friend. He's a little slow... The town is back that way! (points at the opposite direction Harry pointed to earlier on)
"I didn't know they gave out rings at the Holocaust!"
Again when they return to the hotel room
Alan: Guys. What about the tiger? What if he got out?
Phil: Oh, fuck! I keep forgetting about the goddamn tiger! How the fuck did he get in there?
Stu: I don't know, because I don't remember. (Referring to Alan who slipped them roofies)
Alan: One of the side effects of roofies is memory loss.
Stu: You are literally too stupid to insult.
Alan: Thank you.
In Bertie and ElizabethEdward the Eighth complains about the annoyances of "tradition". Whereupon his father growls "Monarchy is tradition". Well, duh!
In Ferris Bueller's Day Off, the principal is chewing over the fact that the title character is absent from school yet again, and he mutters, "I don't trust that kid any further than I can throw him." This prompts the cheerful secretary to respond, "Well, with your bad knee, Ed, you shouldn't throw anybody." He's somewhat less than calmed by her concern.
Near the opening of the 1983 To Be or Not to Be, authorities rush into the theater, stopping the performance of "Naughty Nazis." The complaint was that it could be construed as an insult to Chancellor Hitler.
Pat Healy: Really, [architecture is] only a side thing for my true passion. Mary: And what's that? Pat Healy: I work with retards. Mary: Isn't that a little politically incorrect? Pat Healy: Yeah, maybe, but hell, no one's gonna tell me who I can and can't work with.
Osbourne: If you ever carried out your proposed threat you would experience such a shitstorm of consequences my friend your empty little head would be spinning faster than the wheels of your Schwinn bicycle back there.
Chad: (laughing) You think that's a Schwinn?
From Diamonds Are Forever, after Shady Tree gets James Bond out of the retort for questioning concerning the phony diamonds:
James Bond: Now don't tell me... you're St. Peter?
In Tucker & Dale Vs. Evil, the eponymous friends explore the cabin they bought and see the a board filled with several newspaper-clippings of the brutal murders the previous owner committed in the area. The only clipping they actually pay any attention to is the discount-coupon for a local hotdog stand.
In Mash, as Frank "Ferret Face" Burns is loaded into an MP Jeep in a straitjacket following an act of violence against Hawkeye, Duke poses this question to Colonel Blake:
Duke Forrest: If I nail Hot Lips and hit Hawkeye, can I go home too?
Dr. Strangelove - as the Russian ambassador horrifically explains his country's newly finished Doomsday Machine and how its imminent activation would mean the end of the world, General 'Buck' Turgidson excitedly whispers "Boy, I wish we had one'a them Doomsday Machines!"
One of the Scooby-Doo movies has Scooby and Shaggy investigate a house, only to be captured in a booby trap that has already claimed a girl scout selling cookies and a pair of Jehovah's Witnesses. They're all alive, of course, leading to the following exchange:
Girl Scout: Would you like to buy some cookies? Jehova's Witness: Have you heard the good news? Scooby-Doo: Yeah, there's cookies!
The movie version of Daphne Du Maurier's Rebecca has an example that is at once comical and dramatic.
Maxwell (from an adjoining room): Either you go to America with Mrs. Van Hopper, or you come home to Manderley with me.
Narrator: You mean you want a secretary or something ?
Maxwell I'm asking you to marry me, you little fool.
The protagonists in Dude, Where's My Car? are two stoners who are trying to figure out what happened the night before after a drinking binge, as well as locate their car. While searching, they meet a hot girl they know but never talk to.
Jesse: Hey, have you seen my car?
Christy Boner: Well, I saw it last night. I saw the back seat.
Terrence Mann I want them to stop looking to me for answers, begging me to speak again, write again, be a leader. I want them to start thinking for themselves. I want my privacy.
Ray Kinsella I mean, what do you want? [Gestures toward concession stand.]
Terrence Mann Oh. Dog and a beer.
Ray Kinsella Two.
In The World's End, after first discovering the robots, Andy is more concerned with the fact Gary lied about his mother dying rather than Gary accidentally killing a teenager who is actually be a robot.
At the end of the film, Gary triumphantly declares "There's only one Gary King!" after ripping the head off the Network's teenaged duplicate of him. Later, when he points out that the Network's plan is flawed because humanity is filled with people like him, the confused Network points out that he just said there was only one Gary King.
Weird Science: Chet discovers his grandparents frozen in the pantry:
Chet: What are they doing in here? Lisa: I put them in there. I didn't want to Gary and Wyatt to get into trouble. Quite frankly, they weren't having a very good time at the party. Chet: Not having a good time? Do you think they're having a good time being catatonic in a closet?