History Main / WrongAssumption

* In ''Manga/AsteroidInLove'', since Mira acts like a complete {{ditz}} during the club's [[PicnicEpisode welcoming barbecue]], Yuu assumes that Mira would completely follow that archetype and isn't expecting anything intellectual from her. The problem is, while Mira isn't the smartest girl around, she is uncharacteristically ''curious'' for TheDitz, and her [[GenkiGirl impulsivity]] can turn into motivation to learn what's needed to sate said curiosity. Cue Yuu's utter surprise in the thirty-fourth chapter when she learns that Mira is seriously into ''[[GoalInLife asteroid discovery]]'' and is able to perfectly summarize the process...

* In ''Film/{{Outlander}}'', the priest mistakes the moorwen for a demon and tries to exorcise it. The moorwren mauls him in the middle of his chant.

* In ''WesternAnimation/KungFuPanda'', Tai Lung grew up thinking he would be TheHero instead of the BigBad. In fact, the entire story is a stereotypical action HerosJourney when seen from his perspective. Set up to become TheChosenOne, he is betrayed by his mentor and spends a long time in captivity. Then he breaks out of the predicament they put him in. He overcomes obstacles and beats up a whole lot of {{Mook}}s led by TheBrute; then he beats up a QuirkyMinibossSquad led by his counterpart/ShadowArchetype by revealing an EleventhHourSuperpower he developed after his initial defeat; then he beats up the BigBad, who was responsible for the things that happened to him at the beginning; then the DragonAscendant powered by an ArtifactOfDoom is revealed as the TrueFinalBoss, He manages to wrest control of the artifact from the DragonAscendant, prepares to use it, and... his story crumbles around him because he does not have what it takes to be TheHero. [[spoiler: The Dragon Warrior title he wanted so badly brings nothing with it. Being a true Dragon Warrior requires understanding that there isn't anything that can make you special beyond your own effort.]] His design also includes a StealthPun on the topic. According to creator commentary, the color gold throughout the film symbolizes heroism. The only gold in Tai Lung's design is his eyes because he's only a hero in his own eyes.

* In ''Literature/{{Madicken}}'' by Creator/AstridLindgren, Mia believes that Madicken is a stuck-up SpoiledBrat. But even though it's true that Madicken is the richest kid in their class, she also is very nice. And because her father is a BourgeoisBohemian, she has been taught to care about social justice. And in the end, [[spoiler: she and Mia can even become friends]].
* In ''Literature/MansfieldPark'' by Creator/JaneAusten, Henry Crawford honestly seems to believe he's the PrinceCharming character, who will marry the Literature/{{Cinderella}}-esque heroine and rescue her from her depressing life with her [[AbusiveParents neglectful family]]. Thus he feels completely confident after she rejects his proposal that they'll still inevitably be married, and both he and his sister still consider the marriage a sure thing. Unfortunately, he's actually the HandsomeLech character, who only passes himself off as Prince Charming to seduce women for fun, which he can't give up even after supposedly [[LadykillerInLove falling in love with Fanny Price]]. He came so close to being the romantic hero he wanted to be... and he blew it.
* In ''Literature/{{Overenskommelser}}'' by Creator/SimonaAhrnstedt, Beatrice assumes that Seth is [[TheCasanova a Casanova]], who doesn't care more for her than for any other woman. The truth is though that while Seth has had many meaningless affairs with many different women, he does have genuine feelings for Beatrice. Seth assumes that Beatrice is a shallow GoldDigger, who only sees him as a fun fling before she gets married to an old aristocrat and becomes a countess. The truth is though that she has been threatened into her betrothal to Count Rosenschiöld by her abusive uncle, and that her heart belongs to Seth... But several unfortunate circumstances (including her cousin completely screwing them over) only makes them even more sure that they can't trust each other. Of course, all of this could have been solved if they only had talked to each other, but it takes them twenty months to actually reach that point...