History Main / IfOnlyYouKnew

* ''[[https://archiveofourown.org/works/1093125/chapters/2200459 Winter Pilgrim]] has this in Isako Toriumi's chapter. She's speaking to [[HumanoidAbomination Ryoji]] [[BenevolentAbomination Mochizuki]], who - unknown to her - is the herald of TheEndOfTheWorldAsWeKnowIt (and while Ryoji is an AntiAntiChrist, he tragically has no say in whether said end of the world takes place or not).

'''Isako''': "You know high school's not the end of the world, right?"\\

* ''Fanfic/{{Dermabrasion}}'': When Dabi dyes his hair red as part of a disguise, Twice exclaims that he could be a natural redhead. Dabi thinks of this trope word for word, because he really ''is'' a natural redhead; well, ''was'' before his hair turned white.

-->-- ''Demian'' by Creator/HermannHesse

* In Creator/HermannHesse's ''Demian'', the protagonist gets blackmailed into helping a bully (he hadn't even done the deed he was being blackmailed with, but the bully eventually coerces him into a actual misdeeds). While he's living under this DarkSecret, he comes to resent his innocent family, who have no idea what's happening. (He is eventually rescued by the title character).

** In one of his early reviews, he makes reference to a supposedly made up game called ''Taxman'' [[labelnote:Note]](What he meant was ''Wall Street Kid'' for NES)[[/labelnote]]. Later on, he learns that was a real game that was a ''VideoGame/PacMan'' clone.

** ''[[Manga/JoJosBizarreAdventureStoneOcean Stone Ocean]]'': In the WholeEpisodeFlashback, Weather Report is shown to have been SwitchAtBirth. Years later, Pucci's sister remarks on her new boyfriend, who is actually Weather.

'''Anya:''' ''(has visibly sweating OhCrap face and loud heartbeat because [[{{Telepathy}} that's exactly what she's doing]])''

This is sometimes expressed as "You have no idea" or something along those lines.

* Hans's speech to a dying Anna in ''WesternAnimation/{{Frozen 2013}}'' about how nobody ever loved her has them both assume that Elsa never really loved her sister at all which given what she did to her sister before, certainly has a bit of credibility even if we know that isn't the case for her. Of course even ignoring that, there is still Kristoff and Olaf, both whom definitely shown to care for her particularly when the latter saved her and helped relift Anna's spirits up after realizing that her sister and former lover may not love her but there are still others who do such as the snowman and Kristoff himself.
* The song "I'll Make a Man Out of You" in ''WesternAnimation/{{Mulan}}'' has the line, "Did they send me daughters when I asked for sons?" The commander thinks he's turning boys into men, but of course, with Mulan the starting point is a bit different! Though ironically, she becomes much a more capable soldier than her comrades in arms.

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%%[[folder:Music]]
%%* Shinedown has a song entitled "If You Only Knew".
%%[[/folder]]

[[folder:Visual Novels]]
* In ''VisualNovel/ApolloJusticeAceAttorney'', during the credits roll, Trucy says that Apollo staying in the agency feels like [[spoiler:meeting a lost brother. He really is her long lost half-brother, on her mother's side]].
[[/folder]]

[[folder:Webcomics]]

* In the ''WesternAnimation/BatmanTheAnimatedSeries'' episode "Almost Got 'Im", several of [[RoguesGallery Batman's enemies]] are playing poker and chatting about their foe. Penguin speculates that Batman experienced [[DarkAndTroubledPast "some crime-related trauma when he was younger"]].
* In ''WesternAnimation/BatmanBeyond'' "[[Recap/BatmanBeyondS3E10E11TheCall The Call]]: Part 2", Superman offers Terry a place in the Justice League, citing that the latter's predecessor "wasn't what you'd call a joiner." When Terry says he may have more in common with Bruce than he thought and leaves, Superman knowingly says out of his hearing range, "More than you think, son," [[spoiler:implying that Superman is well aware of Terry's blood relation to Bruce as discovered in ''WesternAnimation/JusticeLeagueUnlimited'' episode "[[Recap/JusticeLeagueUnlimitedS2E13Epilogue Epilogue]]".]]

* In ''WesternAnimation/TeenTitans2003'', in the episode "Homecoming, Part 1", the Titans meet the Doom Patrol. The Doom Patrol expresses skepticism about the competency of the Titans to combat the Brotherhood of Evil, saying something along the lines of "We've been fighting this great evil our whole lives. What have '''you''' done?" One of the Titans--having just come from defeating a trans-dimensional demon who destroyed the world by showing up -- responds, "You have no idea."

-->--Creator/HermannHesse, ''Demian''

-> "Huh. So that's ''exactly'' what it means."

* Rin, from ''Manga/BlueExorcist'', was [[BullyingADragon harassed and called a demon]] as a child. Guess [[{{Satan}} whose biological son]] [[HalfHumanHybrid he turns out to be]]?

'''Anya:''' (''has visibly sweating OhCrap face and loud heartbeat because [[{{Telepathy}} that's exactly what she's doing]]'')

'''Shinji:''' (thinking) ''You have no idea, Misato-san, and right now I almost wish you did.''

* Used almost word-for-word in ''Fanfic/JonathanJoestarTheFirstJoJo.''

* Hans's speech to a dying Anna in ''WesternAnimation/{{Frozen 2013}}'' about how nobody ever loved her has them both assume that Elsa never really loved her sister at all which given what she did to her sister before, certainly has a bit of credibility even if we know that isn't the case for her. Of course even ignoring that, there is still Kristoff and Olaf, both whom definitely shown to care for her particularly when the latter saved her and helped relift Anna's spirits up after realizing that her sister and former lover may not love her but there are still others who do such as the snowman and Kristoff himself.

* ''Film/StrangeDays'': When Lenny asks Mace whether she knows what it's like to love someone who doesn't love you back, she responds this way.

--> '''Han''': You don't know her like I do.
--> '''Beckett''': I'm thinkin' you don't know her well enough.

* ''Series/{{Heroes}}'': Matt Parkman can read minds. His wife, Janice, who doesn't know, tells him, "It's like you're in my head!"
* ''Series/{{Supernatural}}'', a woman is talking to Sam about her baby, Rosie. She says, "It's almost like she can read my mind." Since Rosie is one of the Special Children, she presumably can.
* Comes up a lot in ''Series/SlingsAndArrows''. One scene is in Season 3, when Geoffrey's therapist places an empty chair before him and tells him to envision Oliver sitting there and to talk to him. When Geoffrey opens his eyes, Oliver's ghost IS there (audible and visible only to Geoffrey) and they proceed to have a screaming argument, while the therapist marvels at Geoffrey's ability to engage in the therapeutic exercise.
* One episode of ''Series/{{CSINY}}'' opens with Mac and Stella talking about someone from a previous case who Mac's worried about when an eyeball falls in Stella's coffee ([[spoiler:carried by a vulture which was feeding on the corpse of the VictimOfTheWeek.]]). [[BookEnds At the end of the episode]], Mac's speaking to said person:
-->'''Girl:''' Hey, have you heard the latest urban legend? A woman goes to take a sip of her coffee and an eyeball falls right in the cup,\\
'''Mac:''' ''[smiles]'' [[{{Irony}} That's impossible]].

'''Léodagan:''' ''[surprised]'' What do you mean, "the king needs him"?\\

* ''Series/TheBarrier'': After someone close to his employer dies, Hugo gives him a few words of sympathy and talks about how hard it is to lose important to one's life. The employer, who is old enough to have once dated Hugo's mother-in-law without there being a significant age gap, tells Hugo he's still to young to truly understand. Among other things, Hugo is hiding from his employer that his wife died very recently and that his sister-in-law is standing in for her while both of them are at work.
* In ''Series/{{Chernobyl}}'', a couple of scientists at the Institute for Nuclear Energy in Minsk detect radiation in the air. Ulana Khomyuk determines that it's from nuclear fuel, and she and her assistant begin speculating where it could have come from. The nearest station responds that it isn't them, but Khomyuk says that it can't be Chernobyl because "they'd have to be split open" to be giving off that much radiation. And then they both realize that nobody there is answering the phone....

* In an early arc of ''WebComic/GirlGenius'', Agatha's personal locket is stolen by a pair of thieves on the day Baron Wulfenbach comes to visit the university she works at. She doesn't know that it has a device implanted in it that kills one of the two thieves, and the other is caught by Wulfenbach trying to get to their workshop in the chaos that breaks out. Assuming, due to an EntertaininglyWrong analysis of the scene, that Agatha is the thief's lover, Wulfenbach has them both taken up to his dirigible together and put in one room. Strangely enough, neither of them are happy to see the other, but the man is particularly aggressive and treats Agatha with blatant and open mistrust and suspicion.
-->'''Agatha:''' ''What is the ''matter'' with him? You'd think I ''killed'' that stupid brother of his!''
* ''Webcomic/{{Housepets}}'': Given all of King's constant fretting and stressing out of small things, his girlfriend Bailey mutters to Sasha that 'Sometimes I suspect he's a miniature human in a dog suit' - unaware that King is a ForcedTransformation victim.
* ''Webcomic/DearChildren'': In Chapter 3, Josh accidentally hits a major truth when he's hamming it up among the shipping containers in front of Devin's camera: namely, that important things can be learned by studying the movement of crates. Though Josh doesn't know it, Arthur Langworthy appears to be moving supplies and/or creatures for the cult in shipping containers, so this is quite a pertinent comment.
* ''Webcomic/DokiDokiLiteratureGirls'': After being asked by Monika what Creator/HPLovecraft's novels are about, Yuri explains that he pioneered a genre of horror called [[CosmicHorrorStory "cosmicism"]] which that deals with the fear that our existence is meaningless in the grand scheme of things and that we're just a creation of a greater, unfeeling God who doesn't care about us. She then asks Monika whether she would become a nihilistic psychopath if she realized that everything she ever felt was insignificant and that our world held little value. Unbeknownst to Yuri, her description of cosmicism is actually a perfect reflection of Monika's situation as [[FourthWallObserver someone who's aware of her own status as a fictional character]], unhappy about it, and gets driven to commit cruel acts against the other characters because of it.

* ''Film/NoobLaQueteLegendaire'': The [[Series/{{Noob}} webseries]] that preceded the movie established Abraham was a NunTooHoly priest, but the info came from his ManChild son Sparadrap, while the story is set in a country in which priests are supposed to stay celibate. Abraham makes his debut in the movie and reveals to the audience that there is more to him than Sparadrap knows while chatting with his younger but more aware son, and the secret is something that was so far hidden for a ''very, very'' good in-universe reason. During this occasion, Abraham spends time with Sparadrap and his friends, and keeps the "just a priest who happens to have children, nothing else to see" act for the sake of keeping the secret. Abraham eventually leaves and one of Sparadrap's female friends, who apparently didn't fully believe Abraham was a priest until meeting him, comments on how she's creeped out by the idea of Abraham being a priest. Sparadrap's brother happens to be present when she makes the remark and can't help letting the words "If only you knew." escape his mouth.

* ''WebVideo/TheAngryVideoGameNerd'':
** In the Colecovision episode, he jokes that he wonders if ''Series/TheAddamsFamily'' had a Coleco Adam computer. The Addams family were actually the first TV family to own a computer, albeit one of the old fashioned UNIVAC types.
** In one of his early reviews, he makes reference to a supposedly made up game called ''Taxman'' [[labelnote:Note]](What he meant was ''Wall Street Kid'' for NES)[[/labelnote]]. Later on, he learns that was a real game that was a ''VideoGame/PacMan'' clone.
** In his review of ''VideoGame/ZeldaIITheAdventureOfLink'', he points out the famous "I am Error" oddity, and jokes that it's probably just the character's name. In fact, he's right; the character really ''is'' named Error.

* In ''WesternAnimation/TeenTitans2003'', in the episode "Homecoming, Part 1", the Titans meet the Doom Patrol. The Doom Patrol expresses skepticism about the competency of the Titans to combat the Brotherhood of Evil, saying something along the lines of "We've been fighting this great evil our whole lives. What have '''you''' done?" One of the Titans--having just come from defeating a trans-dimensional demon who destroyed the world by showing up -- responds, "You have no idea."

-->--Creator/HermannHesse, ''Damian''

->''A strange new feeling overcame me at this point, a feeling that stung pleasurably: I felt superior to my father! Momentarily I felt a certain loathing for his ignorance. His upbraiding me for my muddy boots seemed pitiful. "If only you knew" crossed my mind as I stood there like a criminal being cross-examined for a stolen loaf of bread when the actual crime was murder.''
-->-Creator/HermannHesse, ''Damian''

* In ''Manga/SPYxFamily'', the Forger family is asked about [[HappilyAdopted Anya's]] strengths and weaknesses during the Eden Academy interview. Her father's answer is funny, because Anya can break the MutualMasquerade within her new family at any given time (but deliberately chooses ''not'' to):

* In ''Film/SpiderManFarFromHome'', Quentin Beck claims [[spoiler:to come from an entirely different universe. He's lying, but based on trailers for ''Film/SpiderManNoWayHome'', the multiverse ''does'' exist, much to Peter's shock]].

* ''LightNovel/AscendanceOfABookworm'':