Lampshaded in a conversation between Hermione and Snape.
Snape: Can anyone tell me what a portkey is?
Hermione: A portkey is a enchanted object that will transport whoever touches it to a location decided upon by the enchanter.
Snape: Very good. Now can anyone tell me what foreshadowing is?
Later, horcruxes are brought up.
Lavender: Professor, can, like, a person be a portkey?
Snape: No, that's absurd! Because then if a person were to...touch themselves they would be instantly transported. A person can, however, be a horcrux.
Harry: What's a horcrux?
Snape: I'm not even going to tell you, Potter, you're just going to have to find that out for yourself.
In the Youtube video The Devil And Daniel Webster, the main character, Javez, along with 2 others mention "not selling [Javez's] soul to the devil." After doing so, a character will look puzzled, and whoever said it will reply, "Foreshadowing."
Well-hidden in episode three of If the Emperor Had a Text-to-Speech Device. Kitten claims that he was the person who led Alicia Dominica to the Hall of the Golden Throne. If one cares to check with canon, the person who took her there was of Centurion rank, second only to Captain-General, indicating that the Butt-Monkey Custodes might be of higher rank than he seems. Come episode eleven and we find out.
In thisLeft 4 Dead custom campaign video, at about 3:40, the person playing as Zoey tells another person, when asked to predict the future, that he will die and everyone else will live. This actually turns out to be true. Lampshaded by an annotation at the end.
All of Bad Horse's communications are sung by a trio of cowboys. Guess what the ring tone sounds like when he calls?
Several throwaway lines during the songs.
"'Cause the dark is everywhere and Penny doesn't seem to care that soon the dark in me is all that will remain..." Horrible/Penny: There's no happy ending/So they say Horrible: Not for me anyway... "It's not a death ray..."
Commonly in The Slender Man Mythos, whenever someone mentions childhood fears or something along the line of that, expect Slenderman to be intersected with those fears at some point. For a more specific variant, see Just Another Fool, in which Josh mentions breaking an arm after some man in a suit refused to get off the road, so he swerved out of the way and fell off his motorbike. It's heavily implied that the next time this happens, it's not just his arm that gets broken.
The Nostalgia Chick's Xanadu review mentioned her love for robots and had her finally getting pissed off with just doing girly shit. The next episode was a four part arc, starting with Transformers and the Critic yelling at her for going into his territory.
In The Gamer's Alliance, foreshadowing happens quite often. Even relatively minor NPCs or objects referred to in passing can end up having a big impact some time later.
Broken Saints: In chapter 18, "Forecast", at the end of her Tarot reading the Albino fortuneteller advices Raimi to "chose love". Guess what ends destroying the Big Bad plans.
In Chapter 8.2 of Worm, the Travelers stand when Legend tells everyone who faced an Endbringer before to do so. We later find this is because they are victims of the Simurgh, a monster who sets up Disaster Dominoes in those who spend too much time in her vicinity.
The text from the TV ad in Episode 1 featuring Fantöm includes "Cheated?", as an emphasis on him being The Ace.
The little that got revealed about Sparadrap's younger brother in Season 1 pointed towards him having his own character on Horizon. Said character's identity still comes as a surprise.
The first time we see Sparadrap's brother's avatar, he's seen going AFK to send someone an e-mail, just like Sparadrap did little time after being introduced.
Sparadrap's attempts to recruit anything that stands on two legs had him consider recruiting Fantöm into the guild a full season before the plot twist that made the idea no longer completely silly happend.
In the same vein, Sparadrap has been considering levels as low as 2 to be "almost level 100". When he tells a potential new recruit that the guild is almost level 100 in Season 4 prologue, it can be mistaken for the Running Gag. However, Omega Zell is heard saying the same thing a little later, revealing the progress made by Noob between Seasons 3 and 4.
The fact he ends up being the replacement Guild Master in Season 4 and the official one in Season 5 also gives a new meaning to his "Do you want to join my guild?" Catchphrase.
Fantöm accepted to join the guild while Arthéon, the only one who can accept new members due to being Guild Master, was absent. The new recruit didn't realize this and, among all the members present, expected Sparadrap to make his membership official. Eventually justified by the fact that Sparadrap is the one constantly asking for people to join, but still quite an omen looking back.
One of the many gags about Sparadrap's pet collection has him refusing to wear a set of fur items because smourbiffs were killed to make it and Gaea getting him to do so by mentionning their death would have been useless otherwise. A phrase about smourbiffs not getting a useless death reappears later, in much sadder circumstances.
Omega Zell's Nice Job Breaking It, Hero moment in Season 2 finale temporarily created a situation that happend again and became permanent during the Season 3 Wham Episode.
Despite Nazetrîme's tenure in the Noob guild being quite brief, the audience got a good look at her cursor and hence the exact spelling of her name during that time.
The advertizement for Horizon 2.0. in Season 3 premiere depicted a duel between Amaras and Fantöm getting interrupted by an Order player. This is exactly what Spectre did in the same Season's finale.
A Season 5 scene has Fantöm worry about paying back the investments others have made into making his victory against Spectre and Amaras easier, only for Heimdäl to basically tell him "Winning the duel will make paying people back easier". Fantöm seems to consider this False Reassurance due to not having won yet, being aware that the means of paying people back won't automatically come if he does win and possibly the fact that he was planning to use all that help to have Amaras win instead.
If you pause Matt's video Anonymous, you can see Matt wearing the Guy Fawkes mask worn by the members of Anonymous. This foreshadows Anonymous taking over his video at the end.
In Winter is WICKED!, Eugene says that he's a warlock in World of Warcraft. Later, it turns out that he's a warlock in real life, too - he snaps his fingers, and makes it snow.
In Receive Of Many after Hades and Persephone make love during the Midsummer all pomegranate trees in Eleusis loss their flowers and form fruit. Persephone thinks this is a good omen that she is pregnant. She is wrong. It’s actually hinting at her and Hades' role in restoring earth’s fertility each year and giving it energy to grow and bear fruit.
The intro to one Welcome to Night Vale episode makes reference to "that ridiculous god Desert Bluffs has". Said god shows up in the season two finale and it's notpretty.
During the season 5 finale of Red vs. Blue, Church is infected by the Omega AI after it's passed through every other character in Blood Gulch. While everyone else turned into maniacal, psychopathic versions of themselves while possessed by Omega, (except Grif, who was too lazy to act on those impulses) Church observes that he doesn't feel any different. While this seems to indicate that Church is already evil and being infected by Omega just didn't do anything to his normal disposition, it's later revealed that Church himself is an AI, and all of the other A.I.s that appear in the series were made by splitting the original AI, Alpha, into many different ones, with Omega being one of these. Church didn't feel any different because Omega is just one of his split personalities back from whence he came.
Comes up quite often in DEATH BATTLE!. If a contestant is noted to have a useful move or a weakness, you can bet it will come into play somehow later on.
In "Goku vs. Superman", while discussing Superman's weakness to magic, Boomstick wonders if Superman really could be harmed by something like a magic stick. Sure enough, in the fight, the Power Pole is one of Goku's more effective options, doing quite a bit of damage to Superman. Though not enough unfortunately.
In the Pokemon Battle Royale, it's noted that Venusaur is a Jack of All Stats but stressed that it's stats are not optimised. Venusaur's lack of optimised moves fail to significantly harm Charizard or Blastoise, and it's predicted in the +7000 battle scenarios that Venusaur dies first most f the time.
During the rundown for "Deadpool vs. Deathstroke", Wiz mentions how Deadpool being diagnosed with cancer hit him like a flaming semi-truck to the face. Three guesses what literally happens to him in the actual battle.
In "Yang vs. Tifa", during the former's rundown, the song "Sacrifice" plays. Specifically, the lyric "You can't have my life". Tifa ultimately fails in trying to take Yang's.
In "Aquaman vs. Namor," both characters are stated to be able to command marine life, with a specific mention that Aquaman's is developed enough that he can actually affect virtually any living creature and genuinely communicates with sea creatures rather than just telling them what to do. Sure enough, this comes into play during their fight when they try to sic sea creatures on each other, though Aquaman is able to turn Namor's against him, and the killing blow is delivered when Aquaman uses his psychic powers to paralyze Namor and has a swarm of anglerfish tear him apart.
Played for laughs in "Wario vs. King Dedede". When Boomstick speaks about the Gordos that King Dedede sometimes carries around, he mentions that they can be a 'real pain in the ass'. Turns out that line came quite literally to Wario, as getting one stuck in his butt as he was about to release a Waft is what lead to his death. The kicker? The first line Boomstick says after King Dedede's victory is as follows:
Boomstick: "I told you those Gordos could be a pain in the ass!"
A lot of the teachers' bizarre behaviour and painful or subverted rhymes makes more sense with the revelation in episode 6 that they're all pre-recorded programs.
In "Time":
Duck notes "an apple that's fresh is ripe to the core". The apple then rapidly rots while saying "But I rot over time and I'm not anymore". At the end, Tony speeds up time to rot the puppets alive.
When Tony speeds up time, Duck Guy is the only one who isn't moving or expressing pain. Duck Guy dies three episodes later.
In "Love", the teacher gives his lesson only to Yellow Guy. Three episodes later, he's the only one left. This also foreshadows the revelation that the whole thing was Roy's punishment for Yellow Guy.
In "Computers":
The episode begins with the puppets playing a game called "Question Fun". The objective of the game is apparently to reach the door in the centre of the board, and Red is the closest. Later, Red is the only one who refuses to join Colin's "digital dancey", despite Colin describing it as fun, and this allows him to find the way out of the DHMIS world.
Colin spontaneously appears in the room when the song starts with no explanation as to how he got there. Episode 6 reveals that Colin and all the other teachers are part of a simulation that can place them in the room at any time.
In "Health":
Once again, the teachers come out of nowhere with no explanation as to how they got in the room.
The drawing at the beginning has changed to show Red Guy looking in through the window, Duck Guy with X's over his eyes, and Yellow Guy smiling creepily. At the end, Yellow Guy is tricked into eating Duck Guy alive, and Red Guy is revealed in the end credits to still be alive and be trying to help them from outside their reality.
The Healthy Band show the puppets a "health shape" which has Duck Guy's face in the "plain foods" section, i. e., the things the Band are telling the puppets to eat.
In season 2, David shows a surprising amount of emotional maturity twice, first by coolly accepting that as heartbroken as he is that Bonquisha broke up with him the relationship wasn't working for her and he wants the best for her (although he undermines it by attacking her boyfriend afterwards), and second by supporting Gwen finding other work outside Camp Campbell even if he'll miss her. In the season finale, he realizes that the play is just making Max upset and so ditches it to go get him some pizza, telling him that even if the camp makes him happy it doesn't work for everyone and he cares more about Max being happy than following the camp rules.
Despite what you might expect, most of the campers' parenting styles in "Eggs Benefits" don't foreshadow their parents' personalities in the season 2 finale, with one notable exception: Max pointedly does not care about the egg at all.
The mention of a dragon mask in Simon's room hints towards his later association with the Dark Dragon moniker.
Hyeon sings along to Alice Cooper's "School's Out", which includes a line about the school being blown up. Cut to the school finals, where it's revealed that Daigo has planted bombs throughout the building.
Frequently lampshaded in Farce of the Three Kingdoms. Characters who foreshadow their own defeat or death generally receive facepalms. In Chapter 91, Zhao Yun actually gets his way by threatening to foreshadow defeat for Shu.
In "A Dark Night", a guy named Bruce who complains about the gang forcing him out of his seat in the movie theater tries to calm himself down before he gets too angry and informs Newbie that making him angry is not recommended. He's later revealed to be Bruce Banner when he Hulks out after being denied talking to the manager.
In "Parting Rose", Goshua tells Monty that he soon might not be able to look after Emery Rose anymore. He doesn't explain why, but in "Life with Death", it's revealed that he has his godhood revoked for revealing Chris and Ian's true purpose, which he does later in the former episode, and part of his plan is to transfer his soul into another body.
In "One of a Kind", Emery claims she's seen a vampire like Snowball somewhere before, but she doesn't remember where. It turns out her old hometown, Ollie Valley, was ravaged by vampires.
In "The Stars", Susie's room, which the kids broke into earlier, has a poster of a large monster with two kid-sized characters standing before it. By the end of the short, pretty much the exact same scenario is playing out for the boys with The Eyes of the Universe.
While walking out of the mall in "Unwanted Guest", Pump remarks that they should burn the Happy Fella doll they just bought to see if it screams. This ends up coming to pass in "Deadly Smiles", where they force the doll into the oven and Lila sets it to burn, the doll screaming as it melts from the heat.
CJ DaChamp: Lampshaded during a video on Yujiro Hanma from Baki the Grappler. Yujiro says to Baki's mother that he might "break [her] back so goddamn hard, it might kill [her] one day". The video pauses, and the word "FORESHADOWING" leaps towards the screen with a siren. Later on, Yujiro kills her by breaking her back.
If MrBallen begins describing a particular natural or mechanical process during a story, especially if that process sounds like it would be unpleasant to a human, someone in the story is probably going to have that happen to them.
"Homer Attacked by Hounds" has a very apparent instance at the start due to the fact that it's part of the "Seamless Cut" subseries at all.
In "Homer's Twin Brother", Abe has a heart attack and gets sent to hospital, and when Homer visits him, Abe says that he realized that he's going to die someday. He later does get killed by Homer's twin brother Herb.
The thumbnail of "Homer Lives Out the American Dream" shows that Mr. Burns will die in this video. He does gets killed by Homer by throwing him out of an building at the end of the video.
In Inanimate Insanity II episode 11 part 1, Fan's crazy theory ends up referencing events which occur later in the season.
Fan: That tie in the maze defies the pattern in every way possible! And if a tie is possible, the floodgates are open for all sorts of chaos! Barriers will fall from alignmentnote Marshmallow siding with Apple eliminating herself and Suitcase telling Nickel what she really feels about him later in episode 11, a hole will be forged in the depths of timenote Lightbulb and Test Tube travelling back in time in episode 12, pasts will become exposednote the history between MePhone and Steve Cobs shown in episode 13 and otherworldly forces will reign!note the alien invasion of episode 14
While on their way to the Caelestis, '90s Kid briefly wonders if the astronauts were turned into "space-cyborgs" to explain why they can't pick up their bio-readings. It turns out that's exactly what happened, as Mechakara had turned the entire crew into cybernetic drones to aid him in his plan to kill Linkara.
Nyan~ Neko Sugar Girls: After being rescued by the girls, Hitoshi continues to have erotic fantasies about his kidnapper, foreshadowing that he will choose him over Raku in the series finale.
Neopets: The 2021 Festival of Neggs has Topsi look oddly different from usual and he once mentions "the creator". This foreshadows him being secretly a robot.
Left 4 Dead custom campaign video, at about 3:40, the person playing as Zoey tells another person, when asked to predict the future, that he will die and everyone else will live. This actually turns out to be true. Lampshaded by an annotation at the end.