So the adventure's over, the team beat the enemy or found the treasure and got out alive, and it's finally time to relax, say their goodbyes, and head home. And someone says, "I've got this nagging feeling that there's Something We Forgot."
Cut to a major MacGuffin that got left in the dungeon. Or an ally who got trapped and is still waiting for them to get back. Etc. An Oh, Crap! is likely to occur by the character having this realization. Another stock version of this is a parent or guardian—inattentive or overworked at best or neglectful at worst—having forgotten to pick their child up from school, a sports game, a club activity, or similar.
Related to Brick Joke and Locked Up and Left Behind. Often deployed as The Stinger. Contrast What Happened to the Mouse?, in which a dropped plot element does not get another mention, and Offscreen Inertia, when the audience is left to assume that whatever was forgotten will stay in that state permanently.
- In Ah! My Goddess Keiichi comes home and finds Peorth splayed out on his bed wearing lingerie with a bottle of wine in an attempt to seduce him, but he manages to slip away before she notices his presence. After the rest of the plot happens we cut back to Peorth, having finished off all the wine while waiting, drunkenly wondering when he's going to go to sleep.
- Cromartie High School:
- After a hijacked plane trip, the students of Cromartie wonder what they could have forgotten. They deduce that their money from the trip hasn't come back yet, but completely forget about Takenouchi; an impostor fills his place in the school while he is gone. When the impostor is asked if he has any idea of what's missing, he claims that everything's fine.
- When some students from Bass High kidnap Akira, Takenouchi and the others head off to rescue him in a taxi, but the driver ends up getting hopelessly lost. After hours of this, it cuts back to Bass High, where all of the kidnappers have already gone home and left Akira tied up.
- Dragon Ball Z: Fusion Reborn ends with an annoyed Shenlong asking if anyone was going to make a wish. He was summoned near the beginning of the film, but when it wasn't within his power to fix things, he was forgotten about.
- In GeGeGe no Kitaro (2018), after Kitaro defeats a Yokai that turns people into stone, everyone relaxes as everybody is back to normal, until Daddy Eyeball questions where Rat Man is, who is still stuck as a statue.
- Mysterious Joker:
- At the very beginning of one chapter, Joker drugs a Hong Kong movie star named Jackie Lee so that he can impersonate the actor as part of a jewel heist. At the very end, there's a brief cutaway showing that Jackie is still tied up in the ambulance Kaitou left him in.
- In another, it's revealed that Joker has been posing as Inspector Oniyama for the entire chapter. The rest of the cops are shown going home, apparently not realizing the real Inspector is still Bound and Gagged in a bathroom stall.
- In One Piece, Kizaru teams up with a Pacifista to fight Urouge, X Drake and Hawkins. After the Pacifista hurts Urouge, X Drake attacks it. It is a gripping fight between these two, a T-Rex and a Robot. After they both let out their brutal attacks, neither side seems to be winning. Oh yeah, did you forget that KIZARU is still here? Urouge lets out an 'Oh Crap' face before getting sent flying into three buildings.
- A rather dark example happens at the end of the Impel Down arc. With so many freed prisoners on their stolen ship, and they're all too busy trying to fend off several Marine battleships, Luffy doesn't realize that a key member of the group is missing, until it was too late: Mr. 2 chose to stay behind on Impel Down to open the Gates of Justice. Jimbei was the only one aware of 2's plan, and 2 asked him to keep it secret from Luffy until they are past the Gates, or else they would never escape.
- Team Rocket join in the effort in bringing power back to LaRousse City in Pokémon: Destiny Deoxys. Since they kept themselves hidden, the rest of the main cast didn't even know of the Rockets' assistance. At the end of the film, Team Rocket are still at it, not knowing that the crisis is over, let alone that the city's power is back on.
- A karmic one (he was asking for it) in Pokémon: The Rise of Darkrai during the group's first trip up the Time-Space Tower. Ash (and Pikachu) challenges his friends to a race and he gets the lead because of a running start, only to realize too late that his friends used a balloon for their ascent instead. It's easy to tell who makes it to the top first, and after a few minutes of exposition Ash and Pikachu finally catches up with them, all out of breath from the climb.
- When Pachirisu comes down with an illness Ash and Dawn send Gliscor out to fetch Brock who was in town. Of course, with Gliscor being unable to fly without the aid of wind pushing it in the right direction, Brock leaves Gliscor behind in order to get back on time and everyone forgets about it until the end of the episode where Ash freaks out.
- The same thing happens in an XY episode, where the gang has to "trade" Clemont to a spoiled princess in exchange for the PokéFlute, promising to go back for him. After thwarting Team Rocket and waking up Snorlax (the reason why they were looking for the flute), the festival begins, but then they immediately remember poor Clemont...just as he arrives, in his undies (he used his clothes to disguise a decoy to get away from the princess).
- During a race in the Sun and Moon series, the normally athletic Kiawe falls behind the rest of the pack because part of the race involves pulling a wagon (with their Pokémon as passengers) uphill, and his partner is the very large turtle-dragon Turtonator. When the heroes celebrate the end of the race Ash scans the crowd of racers and finally caught on that Kiawe was missing: he never got past that leg of the race.
- In the Tenchi Universe episode, "No Need for Runaways!", after the gang got back Kiyone's stolen spaceship and successfully escaped from the Galaxy Police, Tenchi realized that they forgot to pick up Ayeka and Sasami, who were left at the diner, washing dishes to pay for their dinner.
- During the final battle of Bleach Fade To Black, Kon gets knocked into some spiritual goo which hardens over him. After the threat has passed and Ichigo and Rukia are set to head back to the living world. Ichigo feels they forgot something. Cut to Kon still stuck in the goo, crying (though he manages to get out on his own).
- Right at the end of episode 3 of Saber Marionette J. After the episode's ordeal, Otaru asks Lime and Cherry "Haven't we forgotten something?" but they finally decide it doesn't matter and leave. Cue Hanagata tied to a water mill, being tortured by Baiko and Tamasaburo.
- In the first volume of Yawara! A Fashionable Judo Girl, Jigoro mugs a member of the high school Judo club so that Yawara will be forced to take the boy's place in an upcoming match. When Yawara later asks how he managed to trick her into participating in the match, he suddenly remembers that the poor boy is still Bound and Gagged inside the P.E. storeroom.
- In the climax of the fight against Iroha in Sumomomo Momomo, Momoko and Iroha have a moment of understanding and vow to work together rather than counter to each other. The two celebrate their friendship and go home...promptly forgetting that, as bait, Iroha had tied up Koushi, the man the two were fighting over, and had him dangling over a pool with multiple highly venomous sea snakes. They manage to get him as the two run off.
- An episode of The Kindaichi Casefiles had Kindaichi framed for murder (again), although this time he really did land in the slammer. After Akechi solves the case, he takes off for the night, while Inspector Kenmochi goes with a couple of other officers to celebrate the solving of another crime. Kenmochi has a brief recollection about forgetting something, but ultimately just shrugs it off. Miyuki, meanwhile, was Out of Focus, thinking that Kindaichi stood her up on their date, and goes out on her own, not knowing what actually happened. The last scene of the episode has Kindaichi apparently alone in jail shouting for his innocence, even solving the crime himself (having come to the same conclusion as Akechi did).
- In Nagasarete Airantou, Suzu was secretly tailing her pet pig Tonkatsu (who wanted to do an errand for her by himself) when she comes across Shinobu, lost again and weak from hunger and dehydration. Since she doesn't want to lose Tonkatsu's trail, Suzu promises to help Shinobu once she gets back, but Suzu never did return for Shinobu.
- Another chapter had Ayane tied up by her sister Machi as a quick gag. By the time Machi finally gets back to her, Ayane had already untied herself, although she was also cleaning up some sort of mess (implied to be a Potty Failure).
- Digimon Adventure 02
- The Digidestined opt to stay in the Digital World for an indetermined amount of time until they beat the Digimon Emperor. They make the excuse of going on a camping trip so their parents wouldn't get suspicious. Davis' older sister Jun decides to join the trip since she learned that Matt is going to be there. Matt ditches her the first chance he gets, however, Jun eventually reaches the campground in the end, to everyone's astonishment.
- In one episode, Davis is the only member of the Five-Man Band whose partner Vmon doesn't have an Armor Digivolution that can chase after the Digimon Emperor's flying fortress (Yolei, TK and Kari's partners can fly, Cody can keep up in the sea with Submarimon). Davis and Vmon only manage to catch up at the end of that same episode.
- This is a Running Gag in Boarding School Juliet, and it can happen to anyone, even the main characters. Notable examples:
- Romio spends time with the Wang twins during the Harvest Festival so they can get off his back and he could go on his date with Juliet. Unfortunately, he completely loses track of the time, and the festival's fireworks show comes and goes...and Juliet spent the whole event inside the barrel where Romio told her to hide.
- When Char goes on a Date Peepers mission, she ties Scott to a tree so he wouldn't interrupt Romio and Juliet. He was well-hidden, and Char's the only one who knows he was even there. According to The Stinger, Scott was only found a week later after he has gone feral...
- In Sonic Universe, after a hectic (and hilarious) arc, Amy, Cream, and Vanilla are talking over tea...when Amy suddenly remembers she dropped Nicole two issues ago.
- An issue of Groo the Wanderer focuses on a very large spider that he and Chakaal have to defeat. At some point, he sees something that's unrevealed to the audience that he means to tell Chakkal about later. At the very end, he remembers that there was something he had to tell her but can't recall what. "Oh well," he thinks, "I'm sure it was nothing important." In the same panel, an underground lair filled with giant baby spiders is shown.
- In the Cherry Comics story "Cherry Meets Rambone", Rambone and Captain Guts wander off and leave Cherry staked out naked on the ground. She even calls after them to no avail.
- In Demon Knights #16, Exoristos, the Horsewoman and Sir Ystin are thrown in a dungeon. Exoristos and Sir Ystin are chained together on either side of a wall to prevent them trying to escape. A guard comes and fetches Exoristos and the Horsewoman, leaving Sir Ystin on the other side of the wall wondering where everyone has gone.
- The Transformers: More Than Meets the Eye and The Transformers: Robots in Disguise: The dead universe faction gets split up. Galvatron seems to be dead, Cyclonus stays with the Autobots in the former, and Jhiaxus goes against Orion Pax in the latter. Scourge, however, is unaccounted for, and his absence is brought up, with Cyclonus trying to find him to say good-bye and Sky-Byte seeing a Sweep and commenting on it looking like a friend he knew (implicitly Scourge because the Sweeps are clones of him, and his name is a Mythology Gag for Sky-Byte).
- Eventually, Scourge was confirmed as having died somewhere during the Chaos mini-event. In an author's note. For a completely separate out-of-continuity series.
- Played for both laughs and drama with Tailgate, who at the beginning of MTMTE has fallen down a tunnel, his legs and chronometer are broken, and he's concerned with missing "the launch" (which the audience will presume is the launch of the Lost Light, which kicks off the series). He decides to detonate his fuel reserves to blow a hole in the ceiling and call for help, but due to the broken chronometer he keeps passing out and has no idea how much time is passing. Eventually he succeeds, only for him and the reader to learn that he was down there for six million years, the launch he was late for was the original Ark, and nobody ever noticed he was missing all this time.
- In an issue of Cable & Deadpool where Deadpool and Weasel break into HYDRA headquarters to rescue Agent X, Deadpool forgets about Weasel until he's already being flown out. He has a brief "oops" reaction, then decides not to worry about it.
- Ultimate Marvel:
- At the end of The Ultimates Vol. 2, not all of the Liberators were killed or defeated. Perun, having sat out the big fight, just shows up asking for his comrades.
- In Ultimatum Van Damme had Namor trapped inside a test tube for study. Then the Thing shows up and kills Doom, and ignored Namor. He didn't show up again for several years, in Ultimate FF, where we find out how he was released, days after that.
- Contest of Champions vol. 3 reveals that at the end of Secret Wars, everyone was returned to their home reality (or at least a reality) when Battleworld fell apart...except the Maestro, who was just left floating in the rubble until the Elders of the Universe showed up to investigate.
- Marvel Comics #1000: The origin of Blind Justice. Back when Adam Warlock was created, he blew up the lab he was born in, apparently killing all four of the scientists who'd created him. One survived, but was blinded, and figured at least some of his allies had lived. Grabbing the similarly forgotten Eternity Mask, he began a shadow war against his former comrades, and anyone he thought was working with then.
- After all the events of Original Sin is dealt with, the heroes take a shuttle back to Earth...leaving behind Thor, who's still trying to lift his hammer with no success.
- Ultra Fast Pony:
- In "The Penny and Clyde Show", Reality Warper Discord appears and wreaks havoc across Equestria, but Princess Celestia only cares about the fact that Discord stole her teacups, and she specifically orders Twilight Sparkle to get those teacups back. By the end of the next episode, Twilight has cleaned up the chaos and imprisoned Discord...then realizes too late that she never found those teacups.
- In "Derp and Destruction", the cast flees from Derpy. Just when they think they've escaped, they notice that Rainbow Dash isn't with them. The scene cuts to Dash, imprisoned by Derpy, and forced to reenact scenes from The Silence of the Lambs.
- Abis Mal in The Stinger of Aladdin: The Return of Jafar.
Abis Mal: [still dangling from a tree branch] Does this mean I don't get my third wish?
- In Big Hero 6, Hiro has a major falling-out with his teammates and flies off on Baymax, forgetting that Baymax is their only ride home. Fortunately, Fred's family is rich enough to afford a private helicopter and a butler with a pilot's license.
- In The Stinger of Megamind, the original, dehydrated-into-a-small-cube-early-on-and-then-forgotten-about Bernard only returns to normal because Minion didn't empty Megamind's pockets before doing the laundry.
- Strange Magic: Marianne is so focused on lecturing her sister Dawn after she was attacked by a lizard that Marianne forgets that Sunny was knocked into the forbidden Dark Forest by said lizard. Thankfully, she remembers just in time to save him from being attacked by goblins.
- Double subverted in Toy Story 3. When Woody, Buzz and the gang are taken to the dump in the garbage truck, Barbie gets left behind. The characters are then tossed into the trash compactor and nearly roasted alive in the furnace before being rescued by the Martians (in what amounts to a Brick Joke 15 years in the making, believe it or not). After surviving, Woody and the rest of the toys return home and are donated by Andy to a neighbor's young daughter as he is leaving for college. Throughout all this time, none of the toys notice that Barbie is no longer with them. But then, as the end credits are rolling, the toys receive a postcard from Barbie telling them what is happening at the day-care center, where she decided to stay.
- At the end of The Rescuers Down Under, Bernard, Bianca, Cody, Jake, and Marahute fly triumphantly into the sunset. The movie then cuts to Wilbur the albatross, who was left to guard Marahute's eggs, realizing that he was left behind and starts wondering what's taking everyone so long. And then the eggs start to hatch.
Wilbur: HELP! Anybody! Bernard! Bianca! WHERE ARE YOU?!? Okay, that's it! I'm outta here, this is ridiculous! You can't leave me here alone! [laughs] I'm gone! I am GONE! [the eggs start hatching] Aww, no! Stay in those eggs! That's a direct order! Awww.....hey...you're kinda a cute little feller, coochy coochy...YOW! WHOA! [groans]
- Minor example in Wizards of Waverly Place: The Movie. Max turns a woman into a dog to discourage Jerry from hitting on her. They chat for a while and then walk away with Max feeling like he forgot something. He forgot to turn the dog back into a human.
- The Gamers: Dorkness Rising ends with one of these. After the new party finds their first party's treasure carrying minion. He is left to wait for them again, only to be forgotten about. The Stinger shows him still waiting in the dungeon he was left in.
- Home Alone. The rest of the family forgot Kevin, thus setting him up to be the most famous security system ever unintended.
- The Cherry Orchard ends with all the family leaving the estate and locking up their house; forgetting that their extremely elderly manservant Firs is still inside.
- Although none of the characters actually realize they've missed something, this gets played for horror in the conclusion of The Pit and the Pendulum: Towards the end of the film, Francis hears what he presumes to be Catherine screaming and runs down to the dungeon to save her from Nicholas. Before he can find her, a now-insane Nicholas knocks him out and straps him to the titular device. Nicholas is disposed of, Francis is rescued at the last second, and he and his rescuers leave the dungeon and promise to have it sealed off and never speak of it again...Cut to the villainous Elizabeth, locked in an iron maiden, presumably about to be sealed in the dungeon forever; and since she faked her death earlier in the film no one's going to come looking for her...
- Airplane!: In The Stinger, remember that guy Ted left waiting in his taxi? With the meter running? "Well, I'm gonna give him a few more minutes...but that's it!"
- In Bill, Philip forgets that he has Sir Richard Hawkins in his dungeons till Elizabeth reminds him. The credits show that he is still there at the end of the movie.
- Subverted in Go: While being chased through a rave by the drug dealer they ripped off, the heroine's stoned friend is stashed behind a pile of trash while she gets the car. Through a series of wacky circumstances, he gets left behind while the heroine winds up in the hospital. It's not until the next day - at end of the movie - that she remembers he's still there and goes back for him.
- In Thirty Seconds Over Tokyo a plane takes off from an aircraft carrier and almost drops into the sea. When they are back up the pilot give the order to raise flaps. The co-pilot looks and tells him they were never down. The pilot says "Great. What else did we forget?"
- In Hellboy, Hellboy and Liz scout ahead while Trevor Manning remains in a safe spot in the underground labyrinth. Then Hellboy and Liz get knocked unconscious and dragged to a completely different location, where the final fight with Rasputin goes down. Hellboy saves the world, the credits roll...then partway through, there's a scene of Manning, still in the maze, trying to contact the others on radio. "Uh, guys, I'm still in here..."
- In Krampus, Howard and Linda are in the Engels' house for several minutes before Tommy points out that they appear to a child short, and they realise they have left their baby daughter in the truck.
- Marvel Cinematic Universe
Tony: And then shawarma after?
- After successfully repelling an Alien Invasion in The Avengers, Tony Stark proposes that he and his teammates celebrate with shawarma. Then Thor says that it's not over yet, because there's still one member of the invaders still alive: Loki, who's back at Stark Tower after a thrashing from the Hulk earlier.
- In Thor: The Dark World, a portal accidentally sends a gigantic beast from Jotunheim to London, and the end credits reveal that it's still there.
- Spider-Man: Homecoming had Peter's interrogation of Aaron Davis where the latter is webbed to his car. Peter doesn't know when the web will wear off, to Davis' chagrin. During the Creative Closing Credits, Davis is still trying to free himself.
- Ant-Man and the Wasp further shows the effects of the Snap from Avengers: Infinity War which shows an empty San Francisco, including Scott's house...except the giant ant used as decoy for Scott is still there.
- This also happens in Friday the 13th Part VI: Jason Lives of all films. Final Girl Megan springs Tommy out of jail and locks up the Jerkass deputy in his place. This makes him the only survivor of the sheriff's office by the film's end...if only he manages to get out.
- In Sonic the Hedgehog (2020), after defeating Robotnik, Tom and Maddie talk to each other for a bit. Eventually Tom mentions Rachel, resulting in the two of them realizing that she's still tied to a chair back at her house in San Francisco.
- In The Witch Files, the coven are at Brooke's house making their first attempts at casting spell. They have just levitated Claire when Brooke's mom walks in. They try and act naturally and she soon leaves. Only then do they remember about Claire, who suddenly drops from the ceiling to the floor.
- The head of the Russian mission control commenting on the scuttling of the "Mir" space station: "At this moment the station is entering the dense atmosphere. The remains will sink into the Pacific Ocean. Tomorrow our brave astronauts are going to...to...oh hell! - the astronauts!"
- "Grandma, what does 'boyfriend' mean?" "Boyfriend, boyfriend...Oh, boyfriend!" Grandma opens the closet, and a skeleton falls out.
- Happens in the Discworld novel Wyrd Sisters, to a trio of actors in witch costumes who were mistaken for Granny, Nanny, and Magrat and thrown in the dungeons.
- At the end of the Thursday Next novel The Well of Lost Plots, after Thursday was finally cleared of everything, the question is suddenly raised as to something that is mostly unconnected to the main plot: Who killed Godot, who it was earlier revealed had been murdered?
- Subverted in the Dale Brown novel Act of War. When making their escape from Brazil, the team notices that Manuel Pereira has disappeared, but ultimately his fate is not resolved.
- At the beginning of the Robert A. Heinlein novel The Number of the Beast, the main characters discover that their abstract mathematical research actually holds the key to traveling between different universes - and there are some strange creatures masquerading as humans (which the characters decide to call Beasts) that are out to kill them because of it. So, to protect themselves, they use that research and start traveling to parallel universes, at which point the Beasts that seemed to have been driving the plot are never mentioned again. Until the epilogue, in which all the main characters from lots of different Heinlein novels have all met up for a party and a Beast appears for no apparent reason, and someone remarks, "Quick - get his Number!"
- A subplot example in Harry Potter and the Philosopher's Stone, where the Power Trio, having finally smuggled Hagrid's pet dragon Norbert out of Hogwarts, triumphantly race back to the Gryffindor common room only to realize they'd forgotten Harry's Invisibility Cloak at the top of the Astronomy Tower. And they lose 150 points for Gryffindor when they're caught.
- Again in Philosopher's Stone, Harry and Ron triumphantly lock the mountain troll in the girls' bathroom. After about thirty seconds of self-congratulations, they remember Hermione is in said girls' bathroom.
- Stuck by Oliver Jeffers is a picture book about a boy who gets his kite stuck in a tree. In order to get it loose, he throws various other things after it. At the end of the book, the kite falls down and he plays happily with it. As he goes to sleep that night, he ponders that there's something he's forgotten...The final picture shows that everything else is still up in the tree.
- Subverted in The Addams Family episode "The Addams Family and the Spaceman." Morticia and Gomez walk the professor upstairs, seemingly forgetting the investigators locked in the "playroom." However, Gomez remembers and comes back.
- Used in the first season finale of Babylon 5. Early on, Delenn tells Sinclair that she has something very important to tell him, but he's too busy to deal with it; she agrees to see him later, but warns him that it will have to be soon. Much later, Kosh notes that Sinclair has forgotten something, and he realizes that he never got back to Delenn and runs out of the room. Unfortunately, by the time he arrives at her quarters, it's too late: she has become encased in a chrysalis. Since this is Babylon 5's first Wham Episode, it's not a signal that the good ending isn't as good as it seems, it's a signal that the bad ending is about to get worse.
- A Saturday Night Live sketch where a white, ghetto-speaking pizzeria waiter named Mark Payne (played by feature player Bobby Moynihan) has a part where just as a couple leave their table, Mark realizes that he left his kid on a bus and runs out (but not before yelling at the couple who just left about not leaving a tip). It doesn't help that the next time Mark appears, the kid was never mentioned.
- One contestant on Legends of the Hidden Temple reached the episode's Artifact forgot he didn't have to complete each room's challenge to move on. While he was smashing pots to open a door that was already open, he dropped the artifact and made it all the way to the temple gates, empty-handed.
- On Raven's Home, Chelsea tricks Levi and Booker into hiding underneath the table by saying she'll bake them cookies to prevent them from being seen by Raven's boss, whom Raven had told that Booker and Nina are dogs and had to get real dogs to cover the ruse when her boss came to visit. The episode ends in the middle of the night where Booker and Levi are still hiding under the table wondering how long Chelsea will come back with the cookies.
- In an episode of the new Doctor Who, the Doctor is celebrating how everybody lived that episode, until Rose reminds him that Jack was still trapped on a spaceship that was about to explode. They saved him, though.
- One episode of Dog with a Blog has a Running Gag where the family keeps forgetting Chloe.
- Two and a Half Men:
- In "People Who Love Peepholes", Alan moves out of the house and leaves Jake behind.
- In a more famous example, Jake is stranded again during the Season 2 episode "Can You Eat Human Flesh with Wooden Teeth?".
Alan: It's just— I keep having this nagging feeling I've forgotten something.
Charlie: Hey, if you forgot, it was probably not that important.
Alan: Yeah, you're right. (Continues drinking with Charlie)
(Cut to Jake, alone and drenched in rain outside the soccer field.)
Alan: Look, Jake, I know it's been rough and I'm sorry. We're human, we make mistakes. But I promise you, neither of us will ever, ever forget to pick you up again.
- This happens two more times in the episode. The second time, Charlie forgets about Jake after the latter's school play. And at the very end...
Jake: Yeah, I still wanna go back to Mom's. When is she coming home from Hawaii, anyway?
Alan: Oh, crap!
(Cut to Judith, alone and wet in rain outside the airport.)
- In an episode of iCarly, Sam is left inside a luggage bag and ends up in Malaysia.
- In "iStill Psycho", while the gang are trapped by Nora and her family, Gibby attempts to escape through the chimney, but he gets stuck. After Mrs. Benson and T-Bo rescue them and they're safe at home, Carly realizes they forgot Gibby, who is still stuck.
- A plot point in an episode of Jericho: After Eric and Jake escape the hospital in Rouge's River and get back to Jericho, Eric realizes that he left his wallet there with his I.D., which leads the Blackwater mercenaries to Jericho.
- During filming of an episode of Get Smart Don Adams got the rest of the crew to "accidentally" leave guest-star Don Rickles chained up while everyone went for lunch.
- The finale of The Fresh Prince of Bel-Air has everyone say their goodbye before they go their separate ways from the former Banks household. Will takes one last look at the living room, shuts off the lights and prepares to leave when Carlton comes running down the stairs with his pants down. Turns out he had headed to bathroom and everyone forget he was up there.
- Used as a Sequel Hook at the end of the Endeavour episode "Trove". Morse is sure he's forgotten something. We're then shown a shot of what it was: A notebook was stolen from the crime scene after the police arrived, implying that the criminals can pull strings within the police force.
- One episode of Hannah Montana guest-stars the Cory in the House characters President Martinez and his daughter Sophie. Miley had told her bodyguard Roxie to work for the President after being fed up with her, but then started to miss her and came to the President's hotel as Hannah to get her back. After learning that Hannah has been scheduled to give singing lessons to Sophie, Miley and Lily switch clothes and disguise themselves as each other's alter-egoes so that Miley can sneak out to find Roxie. After Roxie agrees to come back and they reconcile, Miley and Roxie go back to the former's house and Robby Ray asks Miley why she is dressed as Lola, leading to Miley to realize she had forgotten Lily in the hotel.
- On The Big Bang Theory, when Howard is showing Bernadette his old magic items, he come across one he "hasn't seen in years." When he tries to produce a "live dove,"
Howard:(gagging slightly) Don't look in there.
- On an episode of NewsRadio Bill tells a story of a prank from his college days, in which he and his frat brothers locked a pledge in the trunk of a car in a junkyard. When Only Sane Man Dave asks how he got out, Bill suddenly looks alarmed and says, "I've gotta make a phone call!"
- Jonas: In "Band's Best Friend", the brothers tell Frankie they are playing hide-and-seek but as soon as Frankie goes to hide they completely ignore him when their childhood friend comes to visit. Frankie spends the entire episode living in a kitcher drawer not even realizing that the boys aren't actually looking for him. In the ending of the episode, the boys start watching their favourite show before Joe finally remembers that they were supposed to be playing hide-and-seek with Frankie. They panic and run around the house trying to find him and the scene cuts to Frankie still in the kitcher drawer.
- In an episode of The IT Crowd Moss gets inside a claw machine in an attempt to get an iPhone. Jen helps him to try and get it out. At the end of the episode, we see her in bed when out of nowhere she wakes up and exclaims "MOSS!" It's revealed that he's still stuck inside the claw machine.
- An episode of Kaizoku Sentai Gokaiger explains their Early-Bird Cameo in the crossover the previous year is actually a time travel jaunt when one of the Timerangers sent them to that time period for one of the Greater Powers. The Gokaigers deal with two threats (the battle they debuted in in the aforementioned crossover, as well as an independent villain who seeks to destroy the temple they were sent to guard) before returning to their original time. But then when their Mission Control Team Pet (who was left out of the episode's adventure) asks about the Greater Power, the Gokaigers were furious, thinking that they travelled back in time for naught.
- During an episode of Big Love, the family goes on a road trip. About halfway through the episode, Bill comes out of a bathroom to find all three cars (essentially, one for each wife and their respective kids) gone and himself stranded. It turns out that everyone simply assumed he was in someone else's car and therefore drove off without him. (Although given the amount of bickering that had been going on, one can't help but wonder if subconsciously, they did it on purpose).
- In one episode of Leonardo, the gang infiltrate a nunnery by claiming to be exterminators, and saying that for safety reasons, the nuns have to stay in the belltower until they've finished. At the end of the episode, Leo asks Mac how the nuns reacted when he told them they could come down, and Mac suddenly realises he didn't.
- Happens all the time on Chopped, when a contestant finishes assembling their dish as the clock runs through its final seconds, sighs in satisfaction that they've completed their task on time...only to notice that one of their four basket ingredients is still sitting there at their work station, overlooked and untouched.
- A sketch on The Weekly with Charlie Pickering involving Tom, Lucy and Adam interrogating Charlie because they were bored ends with the three of them wandering off to get dinner, leaving Charlie still tied to a chair and calling plaintively after them.
- The Action Figure File Card for Sneak Peek, recon specialist of G.I. Joe: A Real American Hero, provides an example.
Sneak Peek is a legend in the Ranger recon battallions. They tell of one mission where his control unit got overrun. In the ensuing confusion, Sneak Peek was never recalled. He stayed put, observing enemy activity, taking notes and sketching maps for two weeks until somebody remembered he was out there and sent him the signal to return!
- "Have you forgotten something" was a phrase used in the ending of Wizardry IV, to indicate that the ending you got really wasn't the best ending. If you got the real ending it said it followed by "You laugh, for you know that you have not."
- In Banjo-Kazooie, Banjo, Kazooie, Mumbo and Bottles are enjoying a BBQ having escaped from Gruntilda's lair and rescued Tooty. Then Tooty turns up and points out that they didn't actually defeat Gruntilda, who is still at large, and Banjo has to sprint back to the top of the lair for the Final Boss fight.
- Guybrush's crew gets left behind on Monkey Island in one of the endings to The Secret of Monkey Island. This is the ending they went with in the fourth game, where they show up again and complain to Guybrush that it was really difficult to Escape from Monkey Island.
- One of the controversial complaints with Raving Rabbids was the ending of the first game. Rayman, having escaped captivity from the Rabbids, returns to the picnic site where he and the baby Globoxes were kidnapped. Upon realizing he forgot to rescue them, Rayman decides to return by traveling through the Rabbid hole but ends up stuck in the process, ending on a rather silly note.
- In Indiana Jones and the Fate of Atlantis, Indy will say that his victory rings hollow if you let his female sidekick die. It should be noted that freeing her is very difficult, since she's located in an easy-to-miss part of the map, stuck in a cell that requires a very obtuse puzzle to get her out of, and will be Mind Controlled by an evil artifact that you must destroy to free her.
- In Fallout 2, there is an optional quest where you go treasure hunting in Broken Hills. When you finally find where it is, and enlist the aid of a midget to get it out of there, you learn that it's really a bag of bottle caps - which would have been a fortune in the first game, but in the second, it's worthless. When the player character goes on a monologue about how frustrated they feel, they totally forget about the midget who's still stuck down where the treasure was and eventually wander off without getting him out.
- Douglas Adams's Starship Titanic has a bomb that you can arm by pressing the "Press to Disarm Bomb" button. It won't go off while you're on board, so you can forget to disarm it while you finish the game. Of course by the time you are reminded of it later, it's too late and if you haven't disarmed it, the ship explodes.
- In Special Operations 2, an Expansion Pack for Wing Commander II, at the very end of the closing cinematics, after Blair has defeated Jazz and returns for praise from everyone, there's a scene of Maniac's fighter, stranded by a broken jump drive that kept him from assisting in the final fight, drifting in the void while calling for help.
- In the VGA remake of Space Quest I, if you forget to set the Self-Destruct Mechanism on the superweapon before escaping ("You can't ignore, however, a nagging feeling that you've forgotten something important. Now what could that be?"), the bad guys use it to blow up your home planet. And then terrorize the rest of the universe. Oops.
- Likewise, in the same game you can leave the Star Generator data cartridge in a reader on planet Kerona. The ending victory ceremony will then tell you that while it's good that the bad guys didn't get it, it sucks that the planet is now spinning around a rapidly cooling star...Oh well, you're just a Janitor.
- Pikmin 2: Olimar collects enough money, starts his ship, heads for Hocotate...and realizes that he left behind Louie on the Pikmin Planet. Cue second part of the game having the secondary goal to find and rescue him.
- Cave Story gives the optional task of bringing Mr. Little, a miniscule man, from the Mimiga graveyard back to his home in the outer wall. Once you've picked him up, he appears as an inventory item and it's possible to forget about him. But if you do and beat the game without bringing him home, he will appear before the credits roll to ask "aren't you forgetting something?" He will do this even if your actions have caused the island to plummet to earth, presumably killing his family and everything else within.
- In the ending of Conker's Bad Fur Day, Conker realizes he forgot to bring Berri back to life, but he can't do it now that the programmers aren't there to give him a second Deus ex Machina.
- At the start of Sam & Max Hit the Road, the duo catch the Mad Scientist, but forget to untie his hostage and disarm the bomb.
- FTL: Faster Than Light curbs this with regards to having your crew aboard the enemy ship. If you attempt to jump away while you have crew on the enemy ship, the game prompts you if you really want to leave before getting your crew back together on your own ship. It's still possible to forget to beam your crew off the enemy ship before blowing it up, though.
- In LittleBigPlanet 2, at the end of the Toy Story DLC, the Toy Story gang and Sackboy capture the Evil Dr. Porkchop in a cage. They then walk off, congratulating Sackboy and talking about the epic battle, and the screen fades to black...and then cuts back on, centered on Hamm (no longer the Evil Dr.), still in the cage.
Hamm: Alright, I think it's time to let your old pal Hamm out of the cage...
- The Christmas Episode of The Darkside Detective ends with McQueen and Dooley remarking that they feel like they've forgotten something, and a cut to Dooley's nephew, who they tied to a chair when he was under the villain's mind control and is still tied up because they got sidetracked before they got around to untying him.
- At the end of BoxxyQuest: The Gathering Storm, Anon and Catie get back home and feel like theyve missed something, but quickly decide not to worry about it...We then cut to the Pale Wraith, who reveals his true identity as Boxxyfan, the prequels Big Bad, who has tricked the heroes into giving him control of the STORM. Oops. That bombshell sets the stage for the post-game bonus chapter, if youve met the criteria to unlock it.
- During the You Are Not Alone scene in Final Fantasy IX, Zidane's friends try to talk him out of his Heroic BSoD, but in separate groups. First Vivi and Eiko, then Freya and Amarant, but Zidane just dismisses them and put up several gates between them and himself. After two more battles (first when Zidane reluctantly joins Quina and Steiner, and the second one has Dagger coming to his rescue on her own) with the latter as the one who finally snaps him back to his senses. But before they can proceed onward Dagger asks the whereabouts of the rest of their friends, and they have to go back.
- In Sonic Zombie, at the end of the Space video, Blaze furiously kicks the group out of her ship and speaks aloud that she'll be glad to never deal with them again. Suddenly, Shadow remembers that he forgot something back on his bed, which turns out to be an active bomb that immediately destroys the entire ship.
- The trope is lampooned in an episode of Bonus Stage. It was along the lines of:
Joel: Oh no! We forgot Jessica!
[Jessica appears behind him]
Joel: Oh. Man, we missed out on a hilarious cut away sequence.
[back on the planet]
Mr. Malice: Guys?
- A comedic rather than dramatic example, in the end of the early arc of Flaky Pastry the girls triumphantly leave the dungeon they beat, while the neighbour finally returns with the scrolls of town portal. Well, at least he isn't stuck there since he has those scrolls.
- In this strip of The Order of the Stick, Elan mutters this as they all leave Durkon behind paralyzed on the ground.
- The last panel of this edition of The Wotch, with the owner of a local magical bookstore who was wounded in a previous strip and left behind.
- Annie silencing Reynardine in Gunnerkrigg Court. While it had some disastrous consequences, it was played for laughs a few chapters later.
- Entropy Max: This strip◊ in the Magical Girl Lyrical Nanoha R'r Fan Webcomic by Entropy Max, which lampshades the tendency of Zafira getting ignored by both the writers and the fandom.
- From DM of the Rings: "Uh. Guys?"
- Catena Manor has a beach-visit storyline. It ends with one character harmlessly but solidly trapped under exercise equipment...and completely forgotten by the others.
- Another example of someone being forgotten: Seth, a gamer who gets sucked into hell during one storyline and at the end of the arc is trying and failing to find someone who'll get him out. Much later, he shows up again in asskicking fashion, having put his gaming skills to good use and fought his way out.
- There is also the part when Dave was brought back to life as a zombie. Helen and Mell left his head on a city bus, and forgot all about it. It wound up in the Lost and Found, and got claimed by Madblood (who needed a spare brain for an experiment).
- In Rhapsodies this happens to Kevin once or twice.
- One arc of Nodwick has the title character captured by an evil priest hoping to use him as a sacrifice. After thwarting the villain, the party forgets to release Nodwick, who mentions that he'll probably need to find a way to break the top off the altar he's shackled to and roll the coin-shaped top back home.
- In Rusty and Co., Mimic forgot all about Stabs, leaving her to face an army of monsters. Cut to Stabs Atop a Mountain of Corpses.
- In Bob and George, speaking of April 15th (one of the dates the actual intended comic was supposed to launch) makes Megaman think this.
- At the end of Darths & Droids's Return of the Jedi adaption, the GM points that all of the Player Characters' quests (except Luke's path to the Light Side) are completed. Corey then points out that Luke still hasn't melted down C-3PO and R2-D2 (which Owen Lars asked him to do during the A New Hope campaign), but he accepts that, having decided he doesn't need to complete every quest he is given.
- The Disney Afternoon:
- In the Darkwing Duck episode "In Like Blunt", while Darkwing and Blunt are making up at the end, Darkwing suddenly realizes they forgot to let Launchpad out of the steamer that was his part of the death trap. They immediately run back to the room and discover that he's fine, although the steam shrunk him to about a foot high.
- In TaleSpin, Rebecca and Baloo both forget about Wildcat (who went off to look for a bathroom) at the end of "The Balooest of the Bluebloods", an episode in which Baloo is revealed to be the inheritor of a huge estate. After dealing with a murderous butler and handmaid, the heroes go back home, leaving Wildcat wandering around the huge mansion, still looking for the bathroom.
- The Adventures of Jimmy Neutron: Boy Genius: The special "Attack of the Twonkies" ends on a Cliffhanger where Jimmy realizes once all is taken care of that they never sent Sheen's unmutated Twonkie back, which reproduces and its offspring hop into Retroville.
- Used in an episode of The Venture Bros. - they forgot to free a bunch of supporting characters from a dungeon.
- Happens in "Escape to the House of Mummies Part 2" as well. Dr. Venture is the only one small enough to escape and get help, but he gets caught up in a contest with Orpheus and completely forgets about his family who escape on their own and have an offscreen adventure of which were only given glimpses into.
- The Simpsons:
- Subverted in the "Treehouse of Horror V" short "The Shinning".
[screen shows "Tuesday"]
Homer: Well, it's been a long trip, but we're almost there.
Marge: Homer, Did you remember to lock the front door of the house?
[screen shows "Wednesday"]
Homer: Well, it's been two long trips, but we're finally almost there again.
Marge: When you locked the front door, did you remember to lock the back door?
Homer: D'oh! D'oh!
[screen shows "Thursday"]
[the family sits in complete apathetic silence]
Lisa: Oh no, we left Grandpa back at the gas station!
[more silence, Homer keeps driving]
Lisa: ...what about Grandpa?
- Later, when Homer recreates the "Here's Johnny!" scene, he discovers Grandpa somehow made it to the hotel.
- This is something of a Running Gag for Milhouse — the first time was in "The Otto Show" when Homer and Bart left him buried under a pile of chairs after a Spinal Tap concert.
- And again in "Waverly Hills 9-0-2-1-D'oh", when Bart and Lisa attend the school in Waverly Hills for a short period of time. Bart suddenly remembers at the end that he has to go back because he was playing hide and seek with Milhouse. Cut to a view of the garbage can next to the Kwik-E-Mart with Milhouse's voice saying, "Two weeks! This has gotta be a record!'
- It happened again with Grandpa in "Fear of Flying": when the family returns home after Marge's panic attack on the plane, Bart mentions "You know, I have this feeling that we forgot something...". Cut to Grandpa still on the plane screaming Home Alone style. We cut back to Homer who says "Eh, I'm sure it's nothing."
- Another Grandpa example was in "Cape Feare", when the Simpsons go into Witness Protection, leaving him locked out of the house. "Hello? Hellooo? ...I'm cold, and there are wolves after me!" [wolf howls]
- Also shows up in "The PTA Disbands", where the teachers go on strike. Everyone rushes out of the school so fast a little girl is left stranded on the rings in the gymnasium. "Hello? Mrs. Pommelhorst? I'd like to get down now..."
- As well as "Whacking Day", where Principal Skinner locks Bart, Jimbo, Kearney, Dolph and Nelson in the school's basement. Bart manages to escape, which sets the rest of the plot into motion. At the end of the episode, Skinner finally remembers that the others are still locked in the basement.
- In the episode "E-I-E-I-(Annoyed Grunt)", Homer is inspired by a Zorro movie to go around getting whatever he wants from people by slapping people with a glove and challenging them to duels. Much to his surprise, a Southern colonel accepts and he and his wife move into to the Simpsons' doorstep with his RV. He and the rest of the family flee the city and move into Grandpa's old farm, setting the plot into motion. After the climax of the episode, they move back to their house, with Homer saying "I don't even remember why we left." Of course, the colonel is still there waiting for him. The duel takes place, the colonel shoots Homer in the arm (which doesn't cause any significant damage), and the episode ends.
- Subverted in the "Treehouse of Horror V" short "The Shinning".
- South Park: "Mr. Hanky the Christmas Poo" has Cartman, Stan, and Kyle at the end of the episode commenting that they can't help but feel there was something they forgot. The "something" happens to be the fact that Kenny is still alive by the end of the episode.
- Played with example: In the episode "Cow Days", Officer Barbrady forgets to release the falsely imprisoned couple, who starves to death and rots in jail. The Mayor encourages him to forget the whole thing ever happened.
- In "Spontaneous Combustion" after doing a performance of the Stations of the Cross with Cartman playing the role of Jesus, Stan and Kyle then take him up to the hill and crucify him for real. They do this with the intention of having him die and have a resurrection, which Kyle intends to give to his father.note It's only near the episode's end when they remember that they haven't taken him down and three weeks have gone by. To their amazement, Cartman is still alive, having lived on all the fat stored up in his body, he's now down to skin and bones, and he's really pissed off at them.
- The Fairly OddParents:
- Leaving Tootie locked in the closet (boarded up, no less).
- The time they leave Vicky in the stocks.
- Leaving Chester behind as they drive home, though he uses the opportunity to fight back against a coyote that attacked him earlier.
- In the episode "Shelf Life", Wanda forgot to return Sherlock Holmes back to his book.
- Aqua Teen Hunger Force: In "The Clowning", Frylock freezes Carl (who contracted a bacteria that turned him into a clown) while assuring to the others he'll find a cure. Sixty-seven years later their new "coat rack" breaks into pieces.
- Danny Phantom, with Mr. Lancer being locked in the janitor's room for the entire weekend, with the janitor opening up to get supplies and then shutting the door.
- This is a Running Gag in The Replacements: Dick Daring will say this, and the scene cuts to the Daring family's pet mule Prince Cinnamon Boots, fruitlessly waiting somewhere for help/praise/support. Eventually, in one of the last episodes, he gets sick of it and locks the Darings out of their house till they realize how much they've neglected him.
- The Kid In The Lid episode of Animaniacs: Yakko traps a pet woodchuck in a toilet, who, at the end of the episode, can be heard saying "Hello? Hello? Anyone? Anybody? Can anyone hear me? I'm still in the potty!"
- One episode of Adventures in Care-a-Lot looks like it's going to play this trope straight, with Oopsy, tied to a bunch of pillows (to prevent him from getting hurt), left behind while the others go off to have fun. He even starts calling out for someone ("Hello?"), but Funshine comes back and sets him free.
- The Grim Adventures of Billy & Mandy:
- "Beasts and Barbarians", Grim sends Billy and Irwin to a Dungeon Crawling game world, and then he and Mandy have to go in to retrieve them. After much adventuring, Billy, Mandy and Grim finally return home safe and sound, but Grim can't shake the feeling that they're forgetting something. Cue a final shot of Irwin, still hanging precariously onto a branch where Billy had left him several scenes before and complaining that he's starting to get hungry.
- "Toys will be Toys" has Billy trapped in a box in the back of the closet, whimpering "Hellooooo? Hellooooo?" "...and we never saw Billy again. But then, we didn't look very hard."
- In an episode of Back at the Barnyard, Duke is left in the cage of a dog catcher.
- In an episode of Ben 10: Alien Force, after the resolution of the events of the episode, Gwen forgot that Kevin was in the old factory yet previously beaten by a possessed Cash, despite that she promised to come back for him.
- Twice on Jimmy Two-Shoes in the same episode: Lucius gets Buried Alive, who then calls Molotov to arrest the ones responsible. He does so and leaves...without digging his boss up.
- A Garfield and Friends episode had Garfield trap the mailman by using a snare trap. Just when Jon and Garfield are going somewhere, Garfield lampshades it by stating that he forgot something. Cue the mailman still hanging in the snare. In the end of the episode, Garfield is then openly upset that the mail has not come yet and demands to know why it's taking forever, having completely forgotten about the mailman still in the snare trap.
- Used in Angelina Ballerina: The Next Steps episode, "Angelina's Lost Ice Skates" where Angelina and her best friend, Alice, are excited of going to the ice skating show that they become absent-minded of their things. First, when they left the former's house, they almost forgot their lunches and ice skates if it wasn't for Polly and Mrs. Mouseling retrieving it at the time they left. Next, they left the park without their lunches, resulting in the birds gobbling it with their mouths full. They almost forgot their skates again if it wasn't for the two getting it. When they left Mrs. Thimble's shop for smoothies, Angelina ended up forgetting her ice skates there. Luckily, she gets it, but when she comes back in the rink, she missed her opening solo. Nevertheless, she could still perform with Alice.
- My Little Pony: Friendship Is Magic:
- The episode "The Last Roundup" ends with Applejack finally coming back to Ponyville with her friends, with everyone celebrating her return. We then cut to Rarity and Pinkie Pie trying to make their way back to Ponyville via handcar, having been forgotten about by everyone else after they had fallen off the cart they were using during an earlier Chase Scene.
- In "Magic Duel", one of the first things Trixie does with her boosted magic is delete Pinkie Pie's entire snout. Eventually, Twilight defeats Trixie, helps fix the results of Trixie's reign of terror (except for Pinkies mouth, because contrived writing is the only way for the cheap gag at the very end to work), and helps Princess Celestia entertain some foreign ambassadors. As it looks like the episode is ending, Pinkie interrupts the Iris Out to remind everyone that her snout is still missing. Twilight fixes that, just before the credits roll.
- In "Rarity Takes Manehattan", Rarity realizes she lost track of time and is going to be late for her dress rehearsal for a fashion show. The group manage to get her a taxi, but then realize they forgot to send her dresses along with her.
- Princess Celestia becomes a victim of this in "No Second Prances", waiting for Twilight to get back to the dinner.
- Family Guy:
Stewie: I guess neither of us is really cut out for love, and we should OHMYGOD Jeremy's still in the trunk! Oh god, how long has it been?! Let's see, two...two weeks. Yeah, he's dead. Definitely dead.
- In an episode, Stewie beats up his babysitter's boyfriend and locks him in the trunk of a car so he can make a move on her himself. After failing to win her over, we see him sitting on the couch with Meg during the credits:
- And again when the family head for an outing but Lois realizes they forgot Meg.
- Another Meg related one happens when she calls to be picked up from the skating rink. Peter and his friends head to do so. But decides to stay awhile and skate. Eventually they head off..but forget to bring Meg with them.
- And yet another Meg one done in a parody of Raiders of the Lost Ark where the family escape by a bi-plane but somehow Meg get left behind. When Brian points this out, we see her fall over into the water with poison needles in her back.
- Zig-zagged when they were chased out of their house by angry poltergeists. After initially forgetting Meg as they bundled everyone else into the car, Meg gets in at the last second and chews them out over it.
- In the Avatar: The Last Airbender episode "The Deserter", Aang and friends are introduced to a gang of Fire Nation deserters by a man named Chey, who doesn't seem very popular amongst the gang. At the end of the episode, after the gang abandon their hideout to escape from Zhao, Chey returns from the forest wondering where everybody's gone.
- An episode of Ozzy & Drix involves a female villain and her crew mugging and replacing a group of sailors in order to lead the heroes into a trap. After the villains are arrested, Drix wonders if he might be forgetting something, but quickly moves on. The episode then ends by cutting to a locked room where the real sailors are still Bound and Gagged in their underwear.
- Daria: Jake is in the bathroom, doing...that thing. There's a problem: there's no more toilet paper in the house, so he send Daria to get something. Just go to the store, buy and return, thing of minutes, right? No! When she leaves the store, there is a parade in the street, Tom is looking for Jane, Jane is waiting for Tom, a kid gets lost and ask her for help, a Lion mascot harasses Daria, and so on, and so on...and, at the end of the episode, Jake is still in the bathroom, still waiting for the toilet paper. Does he have to read the Cristina Aguilera article for the 12º time? It was just as well. Daria lost the toilet paper trying to get through the parade.
- The Day My Butt Went Psycho!: In "Basic In Stink", Deuce gets stuck at the top of the detector. As Zack and Elanor are carried away on the shoulders of the jubilant crowd, he keeps waiting for them to come back for him. They don't.
- In the Action League NOW! episode, "Stink or Swim", the league is sent to rescue a pair of drowning victims. Stinky attempts to rescue them, but chickens out, thus leaving the rest of the league to do so for him. On their way back to their headquarters, The Flesh wonders if they forgot something, and sure enough, they forgot to rescue the drowning victims.
- At the end of the Tiny Toon Adventures episode, "Who Bopped Bugs Bunny?", after saving Bugs from a revenge-driven Sappy Stanley, Buster wonders if he forgot something on his way back to Acme Acres. It turns out that he forgot to release Daffy, Plucky, and Hamton from jail (the former for a crime he did not commit, and the latter two for trying to break the former out).
- Averted in "Buster's Directorial Debut" where Sandy Witch feeds Babs a spiked carrot, turning her into a normal rabbit. Buster managed to fight off Sandy and escape with transformed Babs in tow. He decides that restoring Babs' original form can wait until he finishes his film project, leading to an unrelated plot where he deals with Plucky, who was being a prima donna over Buster's film. The episode ends with the typical closing camera iris, then transformed Babs hops in. Buster also comes in and uses Sandy's magic powder to revert her back to normal.
- SheZow: At the end of "Coldfinger", Kelly shows up dripping wet and extremely angry because Guy and Maz had forgotten about her and left her frozen in a block of ice at the convention centre.
- Gravity Falls:
- In "Little Dipper", Dipper and Mabel smash the size-changing crystal after getting returned to normal size. Then they realize they forgot that Soos had been shrunk as well.
Dipper: Lots of glue!
- In "Roadside Attraction", Soos accidentally gets left behind at the corn maze. He's still there in The Stinger.
- When Dipper and Mabel fight off an army of living wax statues, the statue of Larry King gets beheaded; his body is destroyed with the rest of his kin, but his head remains intact, having escaped to the vents. Wax Larry King would appear in the clips during the credits, and becoming a slightly recurring element in later episodes.
- In "Little Dipper", Dipper and Mabel smash the size-changing crystal after getting returned to normal size. Then they realize they forgot that Soos had been shrunk as well.
- Star vs. the Forces of Evil:
- Played for Laughs in "School Spirit": At the end, while the school is cheering Star and Marco, Star gets the weird feeling that she's forgetting something. Then a flying monster that wasn't defeated swoops down and snatches Marco away.
Star: That was it...
- Played for Drama in the episode "Storm the Castle", when the episode ends on an ominous shot of the other half of the star-shaped gem from Star's wand after it was destroyed and reformed. Said item naturally becomes a key part of the show's Myth Arc until the third season premiere.
- Played for Drama again in "Mama Star." When creating portals to Mewni isn't working, Star, Marco, Tom, and Janna find a way to get there through the Realm of Magic, which comes with the side effect of losing their memories. They ride in a car, and forget how to take off their seatbelts. Star, Marco, and Janna manage to, but Tom doesn't, and the others leave him behind and forget him. At the end of the episode, the Firstborn sends Star, Marco, and Janna to different parts of Mewni, and it's likely that they assumed she sent him away as well, so it's a surprise when Star and Marco return in "Cleaved" to find that he's still there, and has not only become completely mindless but is also being controlled by the evil unicorn. Thankfully Marco manages to restore his mind with pudding.
- Played for Laughs in "School Spirit": At the end, while the school is cheering Star and Marco, Star gets the weird feeling that she's forgetting something. Then a flying monster that wasn't defeated swoops down and snatches Marco away.
- Kaeloo: At the end of Episode 61, Kaeloo, Stumpy, Quack Quack and Eugly are looking at pictures. When they find a picture of Pretty chasing Mr. Cat, Stumpy starts to wonder where they are, and the scene cuts to Pretty and Mr. Cat still stranded on the island.
- At the end of Episode 67, after a ballet performance where Stumpy is suspended from the air using ropes, everyone goes home but forgets to untie him.
- In a season one episode of The Koala Brothers, Mitzy's refusal to open the gate results in Buster getting out of the plane to open it, and allow Frank to take off for a postal delivery. There's just one problem...
Mitzy: Buster, weren't you suppose to be in the plane, too?
- The Bump in the Night episode "Loss of Face" has Squishington lose his face after accidentally wiping it off with a rag. When Mr. Bumpy tries to get his friend's face back, he gets held prisoner by the bugs who found the rag. Squishington gets his face back by himself and ends up agreeing to help the bugs find "The Place" (a trash can they intend to topple over to eat the garbage inside) in exchange for Mr. Bumpy's freedom. At the end of the episode, Squishington hears Mr. Bumpy screaming, still being tortured by the bugs holding him prisoner.
Squishington: I knew there was something I forgot.
- An early episode of Kim Possible had Ron locked up in a locker while a dance is going on.
- POWs that continue to be held long after a conflict ends — for example, Americans who continued to be held in Vietnam, or even North Korea — are a grim real-life example. One could also say the same of the children of local women impregnated by soldiers of occupying armies during wartime.
- When Julius Caesar marched on Rome on his return from the Gallic wars, Pompey's government fled into exile — leaving the entire contents of the national treasury behind them. D'oh!
- David Bowie once gave a live stage performance, at the end of which, during his final number, he was picked up, in his chair, by a "cherry Picker" and swung out over the audience; at the end of the number, the lights went out, with Bowie still in mid-air, as the audience got up and went home; the theatre crew locked up and went out to a bar; it was only after several drinks that they realised that Bowie was still in the theatre, in his chair, at the end of the cherry picker arm, fifty-plus feet above the floor of the auditorium; "Were you going to leave me up here all night, you bastards?" was his first question as they frantically returned to the theatre.
- Similarily to the above example, one scene in the Doctor Who-episode "Mark of the Rani" required Colin Baker (who played the Doctor) to be tied to a large pole for a Tribal Carry in the middle of a forest. However, because Baker wore a support harness, untying him every time they reset the stage proved too time-consuming, so the crew just laid him down on the forest floor between takes. When it started to rain, the crew packed up and left to film a different scene in another location...only to realize after half an hour that they'd left Baker behind in the forest, still tied to the pole!
- Apparently, My Chemical Romance has occasionally left their guitarist Ray Toro at truck stops while on tour.
Ray: And the band's kinda driven a couple miles down the road, and I'd have to call them on my cellphone and it's like, "hey...what's up?" And they're like, "hey, how's it going man?" I'm like, "...you notice something's missing from the van?" And they kinda look around and go, "ahh, shit."
- In Empire of Dreams: The Making of the Star Wars Saga, Kenny Baker recounted that, while filming, the cast and crew would on rare occasions forget he was inside the R2-D2 outfit (which could not be taken apart from the inside) and leave to take their lunch breaks. But, he said, someone would usually remember he was in there and come back to let him out.
- Every summer, babies get rescued from the back seats of hot cars because their caregivers forgot they were there. Tragically, such rescues aren't always in time.