An amusing occasion has Mr. Burns going through his checkbook, appearing to find out about his (drugged-up) $500 check for Homer's bowling team, only to be corrected:
Smithers: Uh, sir, that's a check for your boweling. Burns: Oh, yes. That's very important. Smithers: Yes, sir. Remember that month you didn't do it? Burns: Yes, that was unpleasant for all concerned.
In Marge Gets a Job:
Burns: Do you think we could dig up Al Jolson? Smithers: Don't you remember? We did that once before. Burns: Oh yes, he's dead. And rather pungent. The rest of that night is something I'd like to forget.
In season 10's "The Wizard of Evergreen Terrace," Homer has to do research in the Springfield Elementary School library because he was banned from the "'Big people's'" library over some... unpleasantness."
In "Homer and Apu", Lisa plays an Indian instrument called a shenai, and Homer comments that it's "worse than the album Grandpa released" (with no flashback or further information about the matter).
In the season 8 episode, "My Sister, My Sitter," Lisa is trying to get her brother medical attention at a clinic and Smithers won't let Lisa in front of him because of a serious injury that seemingly makes it painful for him to sit down (though this could be taken as a Double Entendre, considering Smithers's closeted homosexuality).
The entire waiting room in that episode was full of people bizarrely injured in Noodle Incidents.
There's an in-episode one for Treehouse of Horror XI: Homer gets through the day without dying, even though his death was predicted by his horoscope. He tells Marge to stop worrying, as the only threats to his life that day were a nasty paper-cut, a tree felled by lightning, a giant globe rolling down the street, a pickaxe to the forehead, a snake bite, and "the testicle thing" (which was never shown).
Many of Bart's blackboard punishment lines could be considered Noodle Incidents (like "I will not teach others to fly," "I am not a licensed hairstylist," "Science class should not end in tragedy," "Making Milhouse cry is not a science project," "Organ transplants are best left to the professionals," "The boys' room is not a water park," "I do not have power of attorney over first graders," and "Next time, it could be me on the scaffolding.") since what Bart did to get detention during the opening credits is only implied.
The season 1 episode "Homer's Odyssey" has Ms. Krabappel mention an infamous trip to the Springfield State Prison, to which Bart replies, "Ms. Krabappel, I didn't open that door!"
"Eight Misbehavin'" features a scene that skips ahead nine months to the Simpson Family riding in the car, and they all discuss events that happened during that year. Marge became "Sideshow Marge", Bart learned the true meaning of Columbus Day, and winter, while Lisa became the most popular girl in school but blew it by being conceited.
In Burns Baby Burns, at the dinner table, Homer says, "It's not like anything interesting happened to anyone else today." We then pan to Bart studying a diamond under a microscope, Lisa with a broken arm, and Maggie wearing a "Cutest Baby" sash.
In Moe Baby Blues, Moe is a roomful of angry mobsters wielding pistols:
Moe: Uh, that's the second most guns ever pointed at me.
From "They Saved Lisa's Brain" (during the subplot of Homer posing for erotic photos):
Homer: You're not going to ask me to pose nude, are you?
Photographer: Well, yes, unless you have issues about revealing your body.
Homer: I don't, but the block association seems to. They wanted a "traditional" Santa.
From "Itchy & Scratchy Land"
Homer: (Fumbling with map): North. South. Nuts to that, I'm taking a shortcut.
Marge: No, Homer. You'll get lost.
Homer: Relax Marge. With today's cars, you can't get lost. What with the silicon chips and such.
(Cut to car pulling up to the amusement park parking lot, severely destroyed, with a wagon wheel in place of a tire, a Homecoming banner being dragged behind, a U.S. Army missile sticking out of the chassis, a school traffic sign stuck to the side, and chickens in Marge's hair)
Peter Lorre-esque character: And when Mr. Dinkley saw what I had done, I was banned from the car wash forever!
In the "Lost Verizon" episode, Homer offhandedly mentions an "unpleasantness in Ecuador" that they have behind them. (And a brief cocoa leaf addiction.)
In The Canine Mutiny, Santa's Little Helper runs away, and Bart is looking for him; Bart has followed the trail to the church, where Rev. Lovejoy and the organist admit he'd been there but had to be turned out because of some mischief. The church organist snaps, "He UN-HOLY'ED the HOLY water!"note Most likely, Santa's Little Helper peed in the Holy Water
Many of Kent Brockman's news broadcasts fall into this trope: "...And that kitten played with that ball of yarn... all through the night."
"...leaving the Vice President in charge".
Another episode has him bid the audience goodnight and then remember that he forgot about "The President being arrested for murder." he tries to squeeze it in but runs out of time.
"...which, if true, means death for us all."
"...making this the most recent Segway accident to claim more than 1000 lives."
"Paris is no more. The legendary city of lights has been extinguished forever as a massive-" (the television is switched off before we hear what happened).
On the season ten episode Lisa Gets An "A", Bart is about to let Lisa into the boys' bathroom. Lisa objects, and Bart replies, "Relax. There's nothing here you didn't see when Dad boycotted pants."
Principal Skinner, recalling the time he almost discovered a comet.
Once... but by the time I got to the phone, my discovery had already been reported by Principal Kohoutek. [A cloud covers the moon; the music and everything else suddenly turns very sinister:] I got back at him, though... him and that littleboyof his...[Cloud passes; everything's suddenly not sinister again] Anyway, that's why I always keep a cellular phone next to me.
We may never know why the Simpsons family is banned from 47 US states (which causes Fridge Logic: If the Simpsons have been banned from nearly all of the U.S., exactly where do they live and where the heck is Springfield? Are we to believe that Springfield is in another English-speaking country [possibly an American territory, like Guam or the U.S. Virgin Islands] or do they live in one of the only three states that haven't thrown them out yet?), though, considering the chaos Homer caused in "The City of New York vs. Homer Simpson" and what happened in "Kill the Alligator and Run" (which is the episode that revealed that the Simpsons have been banned in nearly all of America), it's not much of a surprise.
In "Sideshow Bob Roberts", after Sideshow Bob throws Bart out of his limo, Homer is seen being thrown out of a car by Archie and friends and is warned by Moose to "Stay outta Riverdale!" The same episode shows that Bart somehow made an enemy of Dr Demento.
Bart: I'm only ten, and I've already got two mortal enemies!
In Papa's got a Brand New Badge:
Homer: Aww, every time Santa and me get together something bad always happens.
Possibly a Call Back to the pilot episode where Homer had to work as a mall Santa, or even the example in "They Saved Lisa's Brain".
In Bart-Mangled Banner, Dr. Hibbert had some people dressed as him to distract Bart while Hibbert gave him some vaccination. Something Moe did as Hibbert got the doctor banned from the library.
On the 200th episode, "Trash of the Titans," when Homer announces his candidacy for sanitation commissioner, the courthouse clerk points out that Homer is in a line for people who have to register as sex offenders. In that line are Patty and Selma, Jimmy the Scumbag note the telemarketing scammer from "Lisa's Date with Density," Mayor Quimby's nephew from "The Boy Who Knew Too Much" note the one who was accused of beating up a French waiter when he refused to say, "Chowder," but was found innocent when Bart told the court that he saw the waiter trip and fall on himself in such a way that it looked like he was assaulted, and Moe Szyslak, who complains that the lines for registering sex offenders are always long. The viewer can understand why Moe, the mayor's nephew, and possibly Jimmy the Scumbag would be sex offenders (Moe's a creeper [or at least that's what he's become in later episodes, especially with the running gag about hitting on Marge], Mayor Quimby and his entire male family members are expies of the Kennedys (whose legacy is mired in sex scandals in which no one knows what exactly happened — or someone knows, but he or she doesn't want to talk about it), and Jimmy the Scumbag is...a scumbag), but what's the story with Patty and Selma? Why are they in the registered sex offenders line, and why didn't they leave when the clerk revealed what the line is for? Either they did something so bad that it can never be mentioned or — like Homer in that scene — they too suck at picking lines.note The "sex offenses" line regarding Patty and Selma is probably a reference to "The Cartridge Family" where Patty and Selma lured a TV repairman over to their apartment with the false claim that their TV was broken and then force him to "spend the night" with them during the sequence of Marge leaving Homer after being lied to again about Homer getting rid of his gun.
In Kiss Kiss, Bang Bangalore, before Mr. Burns started showing a movie about outsourcing, he asked for a minute of silence for the workers who died in some heroic, well, whatever it was, we never got to know because "heroic" was the last word Mr. Burns said before Homer chanted for the movie and the subject of the heroic deaths was never brought up again.
At one point in the episode "The Joy of Sect," Rev. Lovejoy is spreading gasoline around the church and muttering "I never thought I'd have to do this again."
At one point in "The Burns and the Bees", when it was suggested Lisa used an abandoned greenhouse to house the bees she's trying to save, Homer commented it used to be a prosperous greenhouse before he was hired to manage it.
One episode had Homer and Lisa breaking into the Springfield museum to see the Isis exhibit. Homer asked Lisa to open the window, because apparently, the police have his prints on file note Though, considering the many times Homer has been arrested for several things such as speeding, driving drunk, buying beer for minors — despite that Kearney is over 21 and can legally get beer for himself — and just general disorderly conduct, this probably doesn't count as a Noodle Incident. Also a minor goof: Lisa was arrested on "Lisa the Skeptic" when the entire town was clamoring over the angel skeleton and she was trying to prove that it wasn't an angel, so the police should have her prints on file as well. Then again, the Springfield police are horribly incompetent, and even Chief Wiggum said on part two of "Who Shot Mr. Burns?" that they don't arrest children like they do in Texas. Also federal law would require Homer to register his fingerprints as a condition of his employment at the nuclear power plant—though again, this could be written off as negligence on SNPP's part. .
In a Costco-esque store, a drunk Barney accidentally knocks over a giant Mrs. Maple bottle (which he confuses for a human) which spills everywhere to which he screams, "Oh, I've killed her! It's all happening again!" note Though that could be a reference to the episode "Rosebud," in which Barney threatened to shoot Homer with a gun, Homer slammed the door in his face, the gun went off, and the last thing we hear is a woman screaming, cop sirens, and Barney muttering, "Uh-oh!"
At the beginning of "Simpsons Christmas Stories", when Flanders is called by Lovejoy to be a substitute pastor and deliver the Christmas sermon.
Flanders: I feel like I'm born again again!
In Grift of the Magi, Homer tallies his Christmas record:
Homer: Let's see, this'll make three Christmases I saved, versus eight I ruined...two were kind of a draw.
The season 11 episode "Bart to the Future" note the "look into the future" episode that has Bart as a washed-up musician and Lisa as the first heterosexual female President of the United States had Future Bart tell Future Ralph that he'll get a settlement for either the spider bite at Disney Land or the incident with the oversalted French fries (neither of which are explained any further, though obviously being Frivolous Lawsuits, they probably don't need to be).
At one point, Selma was briefly married to Disco Stu, although we never see how they met, we never see them dating, and we never see the proposal or the wedding. All we know is that Disco Stu saw fit to petition the Catholic church for an annulment (successfully) and Marge says Disco Stu was her favorite of all of Selma's husbands.
Selma was also married to Lionel Hutz for a brief period off camera (sometime between her marriages with Sideshow Bob and Troy McClure and this was only mentioned when she rejected Homer's idea of marrying Apu Nahasapeemapetilon to avoid him getting deported.
Homer: (on the phone) Hello, Selma? Selma my dear, how are you?... Uh-huh, uh-huh, uh-huh. Listen, shut up for a second. How would you like to marry Apu so he doesn't get deported?
Selma: I'd rather eat poison. My name's already Selma Bouvier Terwilliger Hutz McClure. God knows it's long enough without Nahassapeema-whatever. From now on, I'm only marrying for love... Mmm, possibly once more for money.
Marge, while drunk and impersonating Homer, says "Gee Marge, sorry I set the bed on fire."':
Another example was the death of Dr. Marvin Monroe. Prior to Troy McClure saying he was dead in "The Simpsons 138th Episode Spectacular", the only clue that it had happened was an episode where a place called Marvin Monroe Memorial Hospital is seen. (The word "memorial" is added to a place named for a deceased person.) How it happened and when was a mystery. (Matt Groening claimed that the character was retired because Harry Shearer, his voice actor, strained his throat playing him, and as the character himself had admitted in one episode, his voice became downright annoying.)
In the beginning of season 5 episode 'Last Temptation of Homer', Homer and his buddies are in a situation where they are trapped in a room with toxic gases coming at them from all sides. We then cut to Mr. Burns' office with Charlie saying, "Well, sir, I won't bore you with the details of our miraculous escape..." It's partially subverted as we know how the men got in that mess (In fact, they caused it!).
Apparently, no matter what business the Springfield Historical Society is discussing, their meetings all end the same way:
Mayor Quimby: Can't we have one meeting that doesn't end with us digging up a corpse?!
From 'The Springfield Files', Agents Mulder and Scully make cameos, and we hear this conversation.:
Mulder: Worse than the time we were attacked by the flesh-eating virus?
Scully: No, this is much more irritating.
The season one episode "Bart the Genius" had Bart Simpson make faces at Martin Prince and Mrs. Krapabbel ask Bart "Are those naughty dogs back again?" No other details are given other than supposedly two dogs mated in full view of Springfield Elementary's fourth grade glass some time in the past.
In season 17's "See Homer Run", Dr. Pryor explains to Homer and Marge that Lisa now hates men because of a lack of a positive male role model in her life, illustrating this by showing them pictures she drew herself showing several mishaps involving Homer that Lisa was there to see and traumatized by. One of them is titled "The Day The Policeman Came To My Soccer Game" and shows Homer being carted off by police screaming "I'LL SUE YOU ALL!" while an annoyed referee looks on.
During the "We Put the Spring in Springfield" musical number in season 8's "Bart After Dark", Grampa and Jasper sing that the burlesque house has given them the most fun "since March of 1961".
In season 25's "Steal This Episode", Marge is annoyed that Homer is illegally downloading movies and screening them to the neighbourhood in the backyard. Lisa says that it's "not even the worst kind of pirate Dad's been".
Super Toilet, the wish that prompted the "no more wishes with 'super' in the name" rule. Cosmo tends to start babbling "So... much... clogging..." and curl up in the fetal position when Super Toilet is brought up. Potentially subverted, as when Wanda wishes up Super Toilet, Cosmo falls in and is flushed.
In the episode "Mighty Mom and Dyno Dad", we have this little gem:
Timmy: We could talk.
[Cut to Timmy being pushed out the door by his father]
Timmy's Dad: And that's all you need to know about where babies come from.
Timmy: But what's the machine for?
Timmy's Dad: You'll find out when you're older.
An episode of G.I. Joe had Shipwreck inside a Lotus-Eater Machine, in which he had a home and a wife and kids he lacked in real life. After realizing it isn't real he finally escapes, and encounters his parrot Polly. After questioning whether this is the real Polly or another illusion, the parrot responds "Remember that time in Minneapolis...". Shipwreck hastily cuts him off before he can finish.
On the Curious George TV show, George and the Man with the Yellow Hat are looking at an old photo album with a picture of the man as a boy in mismatched clothes:
"And, uh, after that I decided to only wear yellow."
"The Backwash Incident" in Danny Phantom. Apparently it was bad enough that Vlad lists it as one of the three reasons he wants to make Jack die oh so very painfully.
We learn later at the end what "The Backwash Incident" was when Danny gets backwashed by Jack.
Also, from the same episode as the above, just as Maddie is about to walk out the door, this exchange with Jack occurs:
Maddie: Please try not to trash the house while I'm gone. Jack:(sighs) Suck the house into a parallel dimension ONE TIME, and you just can't let it go, can you?
Done plenty of times with the favors Kim Possible calls in for her rides (there are brief hints at what happened that Kim helped to stop, but rarely elaborates much further than that).
And, of course, "The Chess Club Incident" because, "The first rule of Chess Club is: You do not talk about Chess Club."
Done particularly often in Season 4:
Kim: Like that time you cleaned your room. Ron: We promised never to speak of that dark day.
Barkin: Don't let them tell you they're supposed to have class outside. We put a stop to that after "the jellyfish incident". Shego/Ms. Go: Oh, that's so sweet! You took the class to the beach? Barkin: No beach. Just jellyfish. Don't ask.
And who could forget the "Paper Machete" incident?
Kim: You mean paper maché, right? Ron: I wish I did.
Or the story about how Ron learned to use the potty...
Another episode has Ron look for a job in the paper and sees one about puppies and thinks he might like to work with them. Rufus disagrees. Ron then agrees with him saying something about "The Fetch Incident".
Kim didn't go into detail regarding what she did to the bullies in "D Hall" that always harassed Ron while she was in Ron's body due to a "Freaky Friday" Flip; she only said she gave them some "sensitivity training". The bullies ended up giving Ron all the lunch money they had ever taken from him since kindergarten (plus a new video game).
When faced by an enormous robotic guard bird...
Ron: That is the second biggest flamingo I've ever seen.
Several episodes have Mr. Barkin teaching some new class, briefly referring to the incident that caused the regular teacher's absence.
Supposedly, Barkin also saved the world once, if his speech to Ron about graduation is any indication:
Barkin: " Ah, Senior Year, I remember it well. Best two years of my life; big fan on the football team [...] dated the most popular girl in school [...] I even helped save the world a time or two." Ron: "Right on- wait, what?! You?"
Another one from Ron, he is lampshading an offscreen Noodle Incident that involves Kim trying to fix up a hand-me down, broken down car her father gave her. Things aren't working out at all...somehow Ron is entangled in wires. Poor Ron, if only he knew Rule of Funny.
Ron: Wait a minute?! I wasn't even helping! How did this happen?!
Code Lyoko: Jim, the gym teacher, is a man of Noodle Incidents. He'll frequently exclaim, at some weird event, "Oh! This reminds me of the time I [some incredible activity or profession]!" Whenever one of the other characters asks him about it, though, he'll just reply with a mute, "I'd rather not talk about it." The show makes fun of this at one point when Odd guesses "But you'd rather not talk about it?" to which Jim replies "Actually, I'd love to! But I don't have time right now."
In the flashback episode XANA Awakes, Jim (who is teaching a martial arts class) tells a rather embarassing and not-so-awesome story about fighting a beaver... at which point Ulrich takes a moment to poke fun at the Running Gag, saying, "Maybe you shouldn't talk about that one." Though by courtesy of the series' Reset Button, that incident is not the start of the gag.
In one episode, Odd has been firmly ordered by Ulrich and Yumi never to mention "what happened at the swimming pool" (which may or may not refer to an incident seen on-screen), and by Jérémie and Aelita never to mention "what happened in the gym," which still remains a total mystery. The same episode includes the moniker "Big Fat Cheesehead", an unexplained "private joke" between Aelita and Jérémie.
The only time Jérémie entered the virtual world (rather than being stuck as Mission Control Guy) was never shown, but was apparently very funny to everyone else.
When Tommy asks Chuckie, "When was the last time I ever got you lost?", Chuckie rattles off a list of "adventures" seen in previous episodes, except for the last one: "... and the time I got stuck in the tomato bush, and that dog thought I was a tree..."
Also, when Tommy gets sick and Lou suggests "the Applesauce Cure": "Just hold him upside down and get some applesauce and an old sock big enough for his head...." Nobody's willing to try it again. "I remember that. There was applesauce everywhere!"
In the very first episode, Stu and Drew decide to put on a puppet show for Tommy's birthday party. When Lou reminds them "Don't you remember what happened the last time you two put on a show?", Stu replies "Come on, pop, my arm healed and Drew sees almost perfectly out of that eye."
When Chuckie's "gardening (guardian) angel" appears in the Wonderful Life episode, Chuckie demands to know:
Chuckie: Where was ya' the time I got my tongue stucked on that ice cube? Or the time I got my head caught in the back of that weird-looking chair? Or the time I trapped myself in the birdcage?!
Angel: Gimme a break! I'm only two, you know!
Angelica tries to persuade Chuckie to help at her lemonade stand:
Angelica: Chuckie, have I ever lied to you?
Chuckie: Well, there was that time you told me Spike was my brother, and the time you told me rocks was food, and the...
One Noodle Incident was unusual in that it happened pretty much on-screen, just out of view. Didi and Stu take the children to a Reptar show. While still in the parking lot, Didi asks Stu if he has the tickets. He begins frantically searching himself. Cut to the kids talking, with Didi and Stu in the background. When the scene returns to the adults, they have the tickets.
Didi: What I don't understand is why you put them there in the first place.
Stu: It seemed like a good idea at the time.
In one episode, Grandpa Lou is recounting all the times Stu got himself injured in a do-it-yourself home repair project:
When Phil and Lil suspect Tommy and Chuckie of being Mirror Universe doubles (long story), they test their identities by asking them questions:
Lil: All right, Chuckie, what's the time you were scaredest the most?
Chuckie: It was the time I got my head caught in a sock.
Family Guy averts the trope continually, by showing the bizarre incidents that happened (hence all the Cutaway Gags that aren't about celebrities or show a What If?? scenario) to the point that when they play the trope straight once, during the "Saving Private Brian" episode, Stewie breaks the Fourth Wall to hang a lampshade on the fact.
Stewie: Like Peter went after that hockey coach. (silence) Oh, no clip? Thought we had a clip.
References by Peter, Stewie, and Brian are almost always shown, while those made by Lois are never explained, which often makes them appear even more outrageous.
Peter:"Where did you get that tattoo?"
Lois:"I don't know, Peter. Meth is a hell of a drug."
Actually played straight in one episode when Chris and Peter are at a whale exhibit.
Depending on how canon you consider in-character bits from the audio commentary, it's slightly less of a Noodle Incident. Right after that line, Seth Macfarlane says in Peter's voice "You see I fucked a whale in the blowhole." What situation he was in to allow him to try that and his reasoning for doing so are still unexplained, though.
In another episode, Lois blackmails her father by bringing up the "nice mulatto boy who looks an awful lot like...",
In an episode "Courtship of Stewie's Father", Quagmire wants to tell of some ridiculous sexual escapade, so Peter covers Stewie's ears and we only see Quagmire's hand movements rather than know the full story. Although we do know that it was his right hand that "caused all the trouble."
There's also this little exchange:
Chris: Oh yeah? What about the time she strangled my other sister? Lois:(nervously) Chris, honey, we told you, that was just a bad dream. Chris: But I remember it so clear— Peter and Lois:It was a dream!
In "Blue Harvest", Lois/Princess Leia reminds Herbert/Obi-Wan that he owes her because she forced a bunch of children to remain quiet for an obviously sexual reason but Herbert/Obi-Wan fast forwards through most of the details and all we have is "Joey Lawrence haircut".
In the same episode, Stewie/Darth Vader, when encountering Herbert/Obi-Wan, mentioned a restraining order before fighting him due to something the latter did.
In PTV, Peter apparently goes into grotesque detail on an apparently sexual event that becomes this due to a Cluster Bleep Bomb:
Peter: You know, you're lucky you're good at (AIRHORN SOUND)ing my (AIRHORN SOUND) or I'd never put up with ya. You know what I'm talking about; when you (AIRHORN SOUND) lubed-up (AIRHORN SOUND) toothpaste in my (AIRHORN SOUND) while you (AIRHORN SOUND) on a cherry (AIRHORN SOUND) Episcopalian (AIRHORN SOUND) extension cord (AIRHORN SOUND) wetness (AIRHORN SOUND) with a parking ticket. That is the best!
When asked how he knows the zip code for Juarez, Mexico, Joe mentions going down there one time for stem cells and having salsa rubbed on his legs instead.
A recent one is where Opie from Peter's job got fired and we never find out what he did to get fired besides Peter saying, "Oh yeah, no wonder they finally caught you doing that in here. I mean the underside of your desk looks like Carlsbad Caverns."
In Frisky Dingo, something happened in Phoenix, AZ involving Simon and a pet store that ensures Killface and co. "can never go back to Arizona!"
Killface:(after Simon runs away and steals all the knives, he starts to worry) Call all the pet stores. My god, it's Arizona all over again!
Funny thing is, Simon was going to a pet shop. An episode later we see Simon running a glorified cock-fighting ring where rabbits have knives strapped to them and they engage in brutal fights to the death.
On the pilot episode of the short-lived MTV cartoon 3South, Cindy (Sanford's sister) visits her brother in his new dorm. Upon seeing Joe's skeleton for anatomy class, she yells, "What are you doing here? I thought I killed you!"
The season one episode of Daria entitled "The Big House" opens with Daria being dropped off at her house by a mystery car and sneaking back into the house. We never find out the identity of who was driving the car or where Daria had been.
In "Pierce Me":
Trent: Don't want to get [Jane] a CD, and I can't set foot in a bookstore. Don't ask me why, Daria, I just don't want to talk about it.
Transformers Generation 1: Kup was famed for having a war story every time something reminded him of the events... and he was reminded of a lot of things. We never actually hear the details, but Grimlock is very interested in the Petro-rabbits that reminded Kup about the current air raid taking place. It was a good story.
One of Kup's references in the movie crosses this with a bit of Gallows Humor:
Kup: This reminds me of the shrike-bats of Dromedon!
Hot Rod: How did you beat them?
Kup: I'm trying to remember, there were an awful lot of casualties that day... Oh yeah! We inverted polarity!
Transformers Animated: This trope seems to have a great liking for Captain Fanzone, technophobic head of the Detroit Police Department. Professor Isaac Sumdac mentions at the unveiling of his latest line of police robots that, as he has updated the machines' recognition systems, there will hopefully be no repeats of "that unfortunate incident with the Captain's wife," to which Fanzone scowls visibly. Fanzone himself also mentions a different incident which befell his mother-in-law, presumably also having to do with robots/machines gone haywire.
Also, it's never explained where Megatron actually got his helicopter mode in the first place. It's possible, however, that he may have scanned a helicopter while searching throught the Internet via Issac Sumdac's computers back when he was still just a head, since his at-the-time unfinished body clearly resembled his eventual Earth mode, which becomes said helicopter.
Chip 'n Dale Rescue Rangers: When Monterey Jack goes to see if Geegaw Hackwrench is in, he expresses mild concern that Geegaw might still be mad about... something that happened in Zanzibar involving cheese bread.
Monterey Jack is full of these.
Monty: "This reminds me of the time I got shanghaied in Shanghai on a junk full of junk. I think that happened twice!"
The Zanzibar Incident is one of the series' biggest Canon Fodder supplies because of what little insight it gives the audience into Monty's past and that of Gadget's father.
In The DCAU, several things like this are tossed out every once in a while.
You do not want to know why Batman needed to freeze the Gotham river and stop asking about the near-apocalypse of '09. Ironically, one Noodle Incident — a Future-Version Superman mentioning to Batman Beyond's Batman that the original Batman hated traveling through boom tubes — actually was shown in Justice League, where Batman (BATMAN!) appears ready to throw up after going through one.
The best JLU Noodle Incident are the creatures from the Decoran Nebula that Wonder Woman insisted had their beat down coming. Apperently they weren't misunderstood, they just thought we were food.
The episode "The Greatest Story Never Told" is full of these. Since the story is from the POV of Booster Gold, who was not involved with the main fight with Mordru, we only catch insane clips of the fight while Booster evacuates people. We never learn why they needed Elongated Man ("Maybe they need a vase") or how he ended up stopping the "Big Bad" nor do we get any details into the merging of Superman and Batman into one being (with Wonder Woman's voice) other than Batman giving a look of "You will never speak of this again."
Another great one is in "The Great Brain Robbery" after Dr. Fate has gotten Flash's mind back in his own body.
G.L.: It sounds like Wally, but is there any way to be sure? Flash: You want proof? Until he went off into the Marines, G.L.'s nickname was— G.L.: Stop! It's him. Man, you promised never to repeat that story!
In the Static Shock the episode "No Man's an Island" we learn Hotstreak doesn't like hospitals because he spent 2 years in the hospital when he was a kid. The audience never learns what happened to him to cause this.
Gosalyn: I don't know anything about a pig, and I was nowhere near the boys bathroom at the time! Mrs. Cavanaugh: What pig?
Gosalyn: Dad's never grounded me without a reason before! Honker: Gee, Gosalyn, maybe he found out about that sewer gas incident in the boys' locker room. Gosalyn: Nah, it's too soon. Honker: Um, the UFO hoax at the convent? Gosalyn: No way, I wore gloves.
Gwen: Whoa! So that's what you went to juvie hall for. Duncan:(visibly depressed) Yeah, but at least it's not as bad as what Heather did. Heather: I admit, it was a little unorthodox, but it doesn't come close to what Gwen did, if that's even your real name. [Gwen looks away nervously]
"Justin—the Anti-Me. So we meet again." Sadly, this episode is the only time we actually see Noah and Justin interact in canon.
In an episode of King of the Hill, Hank says that because of an incident at Taco Bueno, Joe Jack isn't allowed to play for the company softball team. Everyone agrees that it was a stupid thing that he did, the details surrounding the event were never explained.
"Maid in Arlen" opens with one of these.
Bill: Do you think I'd meet more women if I changed my name to Tango?
Hank: Don't change your name again, Bill.
In Ed, Edd n Eddy, Edd has an extreme fear of physical activity due to an unmentioned "Dodgeball Incident" that occurred sometime beforehand and apparently led to him being exempt from Gym Class.
In one episode Edd spots Eddy's clothes lying on his floor and asks Ed "Is [Eddy] running around naked again?" The first time he did it we never find out.
There's also "A Case of Ed" where Eddy mooned Kevin; whatever Kevin saw was so disgusting it made him turn green and nearly vomit. Then again, Eddy did moon him.
In The Movie, this is the entire driving force behind the movie, as we never find out just what kind of scam the Eds must have pulled on the kids for them to so determinedly chase after them for ninety minutes, only that somehow, Ed and Eddy screwed it up and that it completely destroyed the cul-de-sac, moreso than in any other episode.
Apparently, whatever they did was so unspeakably heinous, that they needed to pack their bags and skip town before the neighborhood kids beat them to death. What takes the cake is that even after they left, the kids hunted them for days, so this was way more serious than just a scam gone awry, though just how serious it was is never fully explained. The only hint that's given in the film is that Eddy evidently disobeyed Edd's order not to press the red button on whatever it was he built.
In Invader Zim Dib's whole life seems to be either a series of Noodle Incidents, or one big one:
In one episode we get the following exchange:
Prof. Membrane: Son! There'd better not be any walking dead up there! Dib: It's nothing to worry about Dad! And I said I was sorry!
In the first episode, they went through a list of all the crazy things Dib has done, including seeing Bigfoot in his garage "He was using the belt sander." It is never revealed whether these things really happened or if it was just Dib being crazy. There was also the election episode, where Dib jammed a receiver into his ear. Miss Bitters shooed him away saying "Dib! What did I tell you about jamming things in people's ears?"
There was also the episode "Mysterious Mysteries" where not only was there a whole closet full of the stuff Dib sends in (Though a lot of it is probably about Zim, who knows what else could be in there), but the host (And, seemingly the creator) of the show said "No! Not after what happened last time.." he then stroked his scar and Dib flashed on the screen for a frame or two. Not to mention the size of his school records, and occasionally his father, sister, or school kids would mention some of the events of his life. The only time we saw more of his past was when Zim tried to alter it.
And then there's this bit in "Vindicated":
Dib: What happened to the old counselor? Mr. Dwicky: Something... terrible. Voice from vents:Help... meee...
Dib called the FBI in "Zim Eats Waffles."
Greg: (laughs) Hey, wait. You're... Dib, right? Did you ever get that ninja ghost out of your toilet?
Dib: Yes, no thanks to you!
In, "Gaz: Taster of Pork", Dib and Gaz are cornered by police on the side of a building. The next shot showed they had escaped in a beat up car while wearing funny animal costumes.
Gaz: I liked the part where the giant robot squid launched missiles at us.
Zim has a tendency to have giant, unseen conflicts in the middle of episodes. In the last scene of "GIR Goes Crazy and Stuff", Officer Squidman mentions a giant battle that occurred sometime after the previous scene. And "Tak, the Hideous New Girl" returns from an Act Break with GIR and Zim fighting a giant monster in the city.
Zim: What a horrible adventure with that ham demon.
The ham demon was implied to be one of Tak's minions/experiments, seeing as it had photos of her base, which she disguised as a giant hot dog stand.
Sealab 2021, "Radio Free Sealab". A heavily censored exchange has an FCC agent telling another agent about such an incident. All we know is that it involved an orangutan and that it was "legal in Tijuana."
The DVD release has a much less censored version of the exchange as an extra. Like Watterson and the original Noodle Incident, the writers realized that the scene was much funnier when more was left to the imagination.
In an episode of Ren & Stimpy Adult Party Cartoon, Stimpy is terribly upset at the horrible thing Ren did to him and every time he brings it up he bursts into tears, later Mr. Horse who's portraying a psychologist asks him what he did him and he loudly whispers something unintelligible to him and he calls him a lunatic and says he needs to be locked up for it, but we never find out the details behind it.
This is a Shout-Out to an old Nickelodeon episode where Ren told a psychologist that he "smacked" Stimpy. The reaction is the same.
Another episode, Ren is having trouble getting to sleep so Stimpy decides to read to him. All we hear of the story is, "Once upon a time, the sky grew red as blood!" and... "... And his last word, as his head rolled onto the floor was 'AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA!!!' And everybody lived happily ever after. The end." It then cuts to Ren cowering under the covers.
Mighty Max has the unfortunate events in... Rangoon.
The Foster's Home for Imaginary Friends episode "Squeeze the Day" ends with the entire house (except for Mac and Bloo, who were purposely left behind) returning from the beach with Frankie yelling the following at Wilt:
"One day, Wilt— that's all I ask for! One day to rest and relax and you have to go and mess it up! Now I have to go clean up all that sand and somehow find homes for all those jellyfish!
"You're all banned from the beach! That's what the governor said!"
In the opening scene of "Foster's Goes To Europe", Coco explains to Wilt the basis for the episode's rather unlikely set-up, to which Wilt responds, "Now I remember! What a crazy story!" Problem is, to the viewer, Coco is completely unintelligible.
"The Big Picture" finds Mac and Bloo trying to find out what happened one year during photo day when the resulting group photo was missing everyone. Everyone they ask is evasive on the matter. Though it's eventually revealed at the end: Wally the prank master pulled a lever beneath the stairs upon which the friends all stood, making it so everybody fell into the basement.
Codename: Kids Next Door: The one time Numbuh 5 let The Delightful Children From Down The Lane oppress a kid, they made Numbuh 1 bald. No one knows exactly how this happened.
In another episode, she refuses to assume leadership of the team (despite the fact that she is second-in-command) due to some reason that she won't reveal (Numbah 86 knows why, but won't reveal it either, merely saying that she "understands". Possibly, it is the same reason as the one above.) However, she does eventually agree to lead the team when Numbuh 1 leaves in the Series Finale.
In another episode, Numbuh 5 tries to rescue a bunny from a chocolate volcano death sacrifice in a cage. Cue to Heinrich Von Marzipan saying something about "that incident in Guatemala".
That one was eventually explained in Heinrich's last appearance in the show. Turns out Numbuh 5 and he got enacted a ritual that turned a person's best quality into caramels. Heinrich's was that she valued her appearance but was turned into a boy as a result. Heinrich got greedy with the candy and nearly ate them all while Numbuh 5 seemingly abandoned him, leaving him in his male state. He blamed her for the incident ever since. Turns out however Numbuh 5 was looking for a cure for the ritual and had managed to save the last of Heinrich's caramels, which was needed to reverse the curse.
One episode has Numbuh One stressing to get the team to successfully pull off an upcoming mission to make up for an earlier failed mission, "Sector T is still trying to get that rubber cement out of their hair."
One can only wonder why Doofenshmirtz has a problem with underwater welders.
In the episode "The Chronicles of Meap", part of Dr. Doofensmirtz's backstory for that episode involved him not having friends as a kid because he smelled like pork all the time, because of another traumatizing back story that he didn't want to get into. Though that incident may have been revealed later on: for a time, he operated a bratwurst stand, which would explain the pork smell.
Also strangely averted in the same episode, when Ferb drives the ride he'd earlier built across Danville - the speed he's going at causes to rip off all of Baljeet's and Buford's clothes (save underwear), who were just passing by. After a beat, Buford comments "We must never speak of this again", to which Baljeet responds "Agreed".
Lawrence's fishing stories from "The Lake Nose Monster" qualify, as well. The story about "the time [he] caught Big Mouth Ramone" provided us with this gem, at any rate: "...it was either back up the fire escape or lose the pants altogether..."
And from the very first episode:
Candace: Mom! You gotta come home, right now.
Linda: Did a satellite crash into the house?
Candace: No, no no. You gotta see what Phineas and Ferb are doing.
Linda: Seems like we had this conversation before.
Candace: What do you mean?
Linda: I seem to recall you telling me, that the boys were training monkeys to juggle bicycles. And when I come home, there was a stunning lack of monkeys.
Candace: I still don't know how they cleaned it up so fast.
Of course, that implies that they've done crazy stuff like that before the beginning of this summer, but the Christmas special implies that their first project was the rollercoaster.
Doofenshmirtz mentioned another one in "We Call it Maze", as part of explaining his evil plan:
If you haven't seen some of the featured clips in the second clip show, they can certainly feel like this, but in every flashback there's at least one featured that never really happened in the show— of particular note are "the Blow-itself-up-inator" and "I knew I should've gotten a down payment on that elephant."
Played with in "Unfair Science Fair" and later subverted in "Unfair Science Fair (Redux)". At the end of the first, Isabella Garcia-Shapiro commented that Phineas and Ferb made a portal to Mars but didn't use it. She was then told that they DID use the portal but that was "another story". The later episode turned out to be the "another story".
We will never know what happened at Candace's fifth grade graduation with the inflatable—
Of special note is the backstory behind Doof's "Eulg".
Doof: But don't you want to know why I want to destroy the adult diaper factory? It's a great backstory!
Candace wearing a tube top while feeding the geese also falls into this department.
How Buford wound up on Candace's contact list in "The Lemonade Stand" is probably one of these.
Candace wondering how or why she has a poster of a hypnotist in her room definitely counts.
In "Last Train to Bustville", Doofenshmirtz's reaction to being attacked by a dodo bird is "It's exactly like Thanksgiving!" You have to wonder what the story behind that is.
When Lawrence had a contest with his brother to see who could wear the most shirts at the same time, he loses, even though he's wearing so many shirts that it looks like he's in a fat suit. Linda comes over and says, "What's the matter, honey? I've seen you wear more shirts than that."
And this gem from "Where's Perry Pt. 1":
Major Monogram:(After spotting a large box of straws) Hmm, that gives me an idea. And this time it's a good idea. Not like the one I had about the- (scene change)
"Norm Unleashed": Whatever Doofenshmirtz's Schmaltz-inator can be used for, it was something Dr. Diminutive was arrested for when he used the inator.
The Fireside Girls first attempt to get their Beekeeping Patches was clearly a bad idea as they've agreed to not even mention it!
Buford's goodbye words to a bunch of squirrels in "What'd I Miss" probably qualifies:
Good luck, little guys. I'll think of you whenever I get a rabies shot. Which is often.
The animated movie based on Scary Godmother has one. Just like in the original book, it involves glitter and a dog. In the original book, it also was mentioned to be the reason the neighborhood had to evacuate for a week.
"So, anyway, that's how the panda bears broke into the Dairy Queen and WHY I need a lawyer!"
The Oblongs also had one on "The Golden Child" where Pickles mentions the time Milo stuffed Bob Oblong (the dad) into a guitar case and he somehow ended up at a Farm Aid concert.
In "Narcoleptic Scotty," we find out Milo was suspended from school for doing something unspeakable with a fish stick. When Pickles found out, she went to spank him, but, for reasons unknown, it turned into a luau with Milo serving mai tais and Pickles and Beth dancing in Hawaiian grass skirts and coconut bras.
Subverted in the Moral Orel episode when Orel tells his dad he'll "never do THAT with THOSE, in THERE, for that LONG ever again!" and a later episode explains what happened. (See main article.)
Teen Titans: When Cyborg disguises himself as a member of HIVE Academy, his "initiation" involves a pink dress and a unicycle. The only explanation provided is, "Don't laugh, ya have to eat the unicycle". The end of the episode has another example, which involves pink shorts, a tutu, and a rubber chicken.
Robin: You left the Titans.
Beast Boy: That means you have to be initiated.
Raven:Aaaaal over again.
Cyborg: (is dragged away, screaming for mercy)
The Sadie Hawkins Dance at HIVE Academy:
Bumblebee: (to Cyborg) You're gonna pay for that!
There's also the incident involving Raven's first run in with Dr. Light, when she basically goes semi-Eldritch Abomination and drags him under her cloak. We don't know exactly what happens under there, and he's only there for a couple seconds before the others snap her out of it, but whatever she did, it was enough to drain the color from both his face AND his costume. And was apparently so horrifically traumatizing that merely imitating the form later is enough to get him to calmly request to return to jail. note Dr. Light Mind Raped. How ironic.
When a high school principal offers Brain a job as a teacher, he tells them that the last teacher disappeared under "strange circumstances".
Pinky: What happened?
Principal: It's hard to explain if you don't understand the meat packing industry, but man- (laughs) it was funny.
Brain: I have discovered that there is one thing all my plans have in common.
Pinky: You mean Maury Povich?
Brain: Besides him.
The Iron Giant, when Hogarth is attempting to convince his mother to let him keep a squirrel as a pet:
Mrs. Hughes: Do you remember the raccoon, Hogarth? [shudders]I remember the raccoon.
Used straight many times in The Venture Bros., and also subverted many times, when previously unexplained incidents are explained: Billy Quizboy's mechanical hand ("Where did you get that thing anyway?" "That's a good question. I have no idea."), Rusty's pterodactyl, The Monarch having "the charred remains of Wonder Boy [sent to] his beloved Captain Sunshine", Dr. Girlfriend's her first attempt at being a supervillain ("My murderous moppets were hard to handle"), and Henchmen #24's backstory that apparently involved his dad marrying his ex-girlfriend.
Venture Bros. had two entire episodes that were Noodle Incidents: "Escape to the House of Mummies Part II" references a Part I in the "Previously on..." and a Part III in the "Next time on...", but neither of these episodes exist. The result is a series of out of context clips that never get fully explained.
Not necessarily; that wasn't an actual party, and there was nothing embarrassing. Squid simply snapped a photo of SpongeBob crying. An old ad showed another likely candidate: SpongeBob, drunk, wearing a lampshade.
Also, something happened in Mrs. Puff's past that caused her to move away and start a new boating school, under a new name. We know this because of an episode where she lets SpongeBob slide through school, and contemplates doing this before deciding "No. Not again!"
Done again when SpongeBob attempts to hitch a ride on Sandy's space shuttle:
SpongeBob: The moon! Can I go?
Sandy: No way, SpongeBob. Especially after your little mishap with my whirlybird.
[Pan over to Sandy's window to reveal a field of tombstones.] ]]
As the TV in the Krusty Krab is turned on, we see the very end of a news report. In the corner of the screen is a real-life photo of a litter of adorable kittens. The news anchor woman ends the report with "...and there were no survivors."
In "Spongicus" when Plankton considers his latest plan to be his best Karen tells him he said the same thing about his plan to boil Mr. Krabs in a giant bisque, which apparently backfired horribly as Plankton remarks "I can still feel the burns".
In the episode "Rock-a-Bye Bivalve" Patrick promises SpongeBob that he'll return from work at 6:00. The episode then cuts to 12:00 midnight, where Patrick returns home with a lampshade on his head and exclaims, "That was some party!"
There are several references in Danger Mouse to Fifi, who has some past connection to the White Wonder, but is never explained. Penfold tries to bring the subject up and DM always shushes him.
From Chowder: "That was the craziest episode we've ever had!" No, we didn't see it. In fact, that happened twice in the same episode.
In "Sing Beans", Shnitzel tells an apparently dirty joke. The man said that the joke "involved a bucket of fish and a tiny sailor" and that's all we get to know. Also in that same episode, it was shown that an incident involving Tooty-Pooty Beans resulted in the gang being chased by an angry mob. Mung commented on how that day "began so hilarious yet ended very badly".
An example where the incident actually happens just off screen: Early on in the episode "The Warriors of Kyoshi" Katara runs off screen yelling "No, Appa! Don't eat that!" We never find out what exactly Appa was trying to eat and our only clue is the sound of trees being pulled up.
The story behind the Zhang/Gan-Jin feud.
Iroh's journey to the Spirit World.
Though it is implied that he was trying to find Lu Ten to bring him back to life.
This is done again in the following episode when Hayley escapes being trapped in the basement:
Hayley: Hello father! Wondering how I escaped from the basement?
Stan: No, not really.
Hayley: Oh. (beat) ...but it involved training rats.
In the episode "Four Little Words", Stan recalls the four times Francine said "I told you so" to him via brief, inexplicable flashbacks. The first involves a double bus crashed into their garage and Stan dressed in a Queen's Guard uniform. The second involves their swimming pool on fire. The third involves Stan playing chess with a chicken (and losing). The fourth shows two guys hanging to death after trying out Stan's "Xtreme Bungee Xperience".
When a future, cyborg version of Stan comes to the present to win back Francine, who is dead in his time, he comments that the last time he saw her was in the electric chair: "You were so tired... You had been running for so long..."
In "Old Stan of the Mountain", Stan gets a curse placed on him when he insults an old person, turning him, into an old person himself. When he learns his lesson in the end, instead of turning back to normal, he becomes a black man.
Hayley: All right, Dad, think. What was the last interaction you had with a black person.
Stan: It was at the T-Mobile store and it was not positive.
At the beginning of The Adventures of Jimmy Neutron: Boy Genius episode, "Lights, Camera, Danger" the main characters reminiscence about Jimmy's attempts at creative writing. When Sheen mentions Jimmy's Opera, Flashback Effects are cued, then promptly stopped as the other characters do not want to go there.
An episode of Jimmy Two-Shoes has Jimmy suddenly flying into the screen, landing on the pavement and causing it to crack. He mutters "Beezy was right, that was no fun." We never know exactly what "that" was.
Also, whatever caused Heloise's issues with ghosts is left unexplained.
Futurama has a couple of these, usually during Morbo and Linda's newscasts.
"All in all, this is one day Mittens the kitten won't soon forget!"
"And that's why the third graders at PS139 are Morbo's Vermin Of The Week."
And there's the history of "Le Grand Cigar": "This cigar's wrapper is a piece of the original U.S. constitution, was rolled by Queen Elizabeth (during her "wild years"), and was buried with George Burns until grave-robbing space mushrooms...well, you know the rest.
These are actually common for any events that happened between Fry getting frozen in 2000 and waking up in 3000, which included a period where the Earth was ruled by cyborgs, the Second Coming of Jesus somehow eliminating old video tapes, the death of the last human ghost, etc.
Upon throwing away a sophisticated toilet, Fry says "sorry, you know too much".
In the episode "The Sting," Leela has a vivid hallucination of everyone singing "Don't Worry, Be Happy" and exploding after getting stung by bees. When the hallucination ends, Leela asks the crew if they were just singing. Bender responds: "No. I was telling you not to worry. I'm not allowed to sing. Court order." This could be a Call Back to his fallout with Beck on "Bendin' In The Wind," but since most of the events of "The Sting" were All Just a Dream — or, rather, a coma fantasy, the whole question of whether or not Bender has been legally banned from singing becomes moot.
In Put Your Head on My Sholders, Bender learns that lonely people will spend money for a chance at romance. He then comes up with a deviously clever plan that he'll — Smash Cut to Bender (now with a gold plate on his front "tooth") in court with two hooker bots note one of which is Hookerbot 5000 from "Hell is Other Robots." and Leela at his side being sentenced to "$500 and time served."
Bender: Stupid anti-pimping laws.
And then there's Hermes, Amy and Zoidberg's delivery to Fantasy Planet in "The Cryonic Woman".
Zoidberg: For one beautiful night, I knew what it was to be a grandmother. Subjugated, yet honoured.
From "Mars University"
Dean Vernon: Whenever a fire alarm is pulled, Robot House. When the campus liquor store is looted, Robot House. Whenever a human corpse is desecrated...
Also, "Have you ever had a 6 pound halibut shoved up your left nostril?" "Not the left one, no!" or "Reach down my throat and grab the fish!" "Yuck. This is the second grossest thing I have ever done."
And from "Truth Ache": "If you think that's embarrassing, you should see what Kowalski does when he thinks no one's watching."
Adventure Time: Finn and Jake seem to always be coming from or going to an adventure. The story sort of implies that they are constantly adventuring, whether or not the "camera" is following them. In fact, some episodes deal with the duo struggling with a situation that is preventing them from adventuring.
Finn: Remember when I swallowed that little computer?
Or the fry incident with Marceline and her dad. (We actually see this when Finn goes inside Marceline's brain and witnesses her memories)
How in the hell did Lemongrab manage to keep his position of exceedingly high authority, despite OBVIOUSLY being incapable of any positive social interaction or adjustment to being alive? "It's complicated," claims Princess Bubblegum.
Tragically done in Holly Jolly Secrets Part II, all Simon Petrikov knows about the incident where he put on the crown and started seeing visions is that "After that I never saw Betty [his fiancee] again." Unlike most noodle incidents in the show and others the incident is NOT Played for Laughs, it is DEFINITELY Played for Drama.
Muppet Babies: Gonzo asks Kermit if he wants to see him break the world speed record.
Kermit: No thanks, Gonzo. The last time you tried to break the record, it took us two hours to get your head out of the wastebasket.
In another episode, after the Cutie Mark Crusaders latest attempt to get their Cutie Marks ended with them covered in tree sap, Scootaloo mentions that a suprising number of their attempts have ended that way. We never learn anything more about those attempts than that.
Hey Arnold! has a weirder version of this in "Egg Story", given that the viewer may know what they're talking about (a brief scene in the earlier episode "Operation Ruthless"), but the rest of the characters do not.
Harold: Come on, Rhonda. You know you like me!
Rhonda: Where in the world would you get a ridiculous idea like that?
Harold: Remember that time at the Cheese Festival when you jumped the- (Rhonda clamps his mouth shut)
Rhonda: SHH! I told you to never mention that night ever again!
In A Day at the Races and a Night at the Opera, Jay worries that he'll fail as a father, "Just as I did as a husband, and a son, and a Navy SEAL, and an American Gladiator."
In Recess: School's Out, Prickly mentions that T.J convinced the F.B.I. he was a Chinese secret agent and got him arrested. How? We never get to find out.
In the same scene, Prickly also mentions an incident where T.J. apparently used Prickly's personal account to order a motorboat for the school. Exactly how T.J. managed to gain access to Prickly's account was not revealed, and the only other thing known about it is that apparently the Kindergartners were part of the reason T.J. did this.
An episode of Mission Hill has a subplot involving a worldwide crisis. The audience is only given vague hints about what the crisis actually is.
Daffy Duck spends much of the Looney Tunes short "Nasty Quacks" trying to tell an anecdote about a wild party he was at. Snippets include "One guy was swinging from the chandelier, you'd have thought he was a monkey! Come to think of it, he was a monkey!", "The whole thing started with an innocent telephone call...", and "Someone clipped Charlie in the ear, and that started the whole thing over again!"
Korra's attempt to drive and park the team car after Asami got arrested in the eighth episode of The Legend of Korra. They find it two episodes later plowed into a lamppost with a pile of tickets on the windshield.
What, exactly, did Meelo decide was a toilet in The Voice In The Night?
In the Fillmore! episode "To Mar a Stall" we are told that tagger Randall Julian aka. Flava Sava was able to do something to the East wall in 10 minutes with a miniature golf pencil. We never get to see what happened but from the faces of Fillmore and Ingrid it seems that it must have been quite impressive.
Genie: I can't believe I fell for the old "ship-in-a-bottle" trick again!
In Gravity Falls, Grunkle Stan apparently went to jail once in Colombia. No other details are given.
Mabel also dated some cute vampires without telling Dipper.
Mabel: (to Mermando) Same here. Except for a zombie, a gnome, and a couple of cute vampires.
Dipper: I don't remember the vampires.
Mabel: I don't tell you everything.
In the House of Mouse short "Pluto's Seal Deal", Mickey leaves Pluto home alone and tells him not to have things be like what happened last time. "That's right, no firetrucks or news crews!".
In "Pluto's Kittens", Mickey lets Pluto sleep inside for the night and reminds him that he doesn't want what happened last time and points to an Impact Silhouette of Pluto in the floor.
In "Daisy's Big Sale", Minnie tells Daisy that "every time I help you, it's a disaster", followed by showing flashback clips of the two in full body casts, on a police lineup and sinking in wet cement.
In Ben 10: Ultimate Alien, it's never made clear what happened between Paradox and the Celestialsapiens. Whatever it was, it pissed off the entire Celestialsapien race so badly that they issued a restraining order against Paradox and killing him on sight is the one thing both split personalities of Ben's Celestialsapien form "Alien X" will immediately agree to do. To illustrate how significant this is, Alien X's personalities haven't even reached an agreement on whether or not to save the dinosaurs.
In an episode of Chowder, Chowder remarks that he should give some of his gum to Truffles, remembering what happened last time somebody didn't share with her. We don't see what happened, but we hear his thoughts, which consist of explosions and people screaming.
In the Goof Troop episode "Dr. Horatio's Magic Orchestra", PJ backs up Goofy's claims that Pete had sunken much lower on previous occasions by mentioning "the incident with the earless monkey", which, apparently, the characters all agreed offscreen to never bring up again.
Pelswick: The origin of the protagonist's paraplegia is never revealed, aside from it being some sort of "accident."
Earthworm Jim: I had one of those sudden inspirations I so often get just when we seem doomed
Peter Puppy: I am not wearing the dress this time!
Earthworm Jim: No, no, no this time it's a good idea.
In Gentleman Ghost's only appearance in Super Friends, he escapes from his tomb and seeks revenge on Superman and Wonder Woman for previously defeating him and sealing him in the tomb. Other than a brief flashback of the two heroes putting a coffin in the tomb, this previous encounter is not elaborated on.