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Anime & Manga
- Eren Yeager from Attack on Titan often suffers from this: his transformation into the Rogue Titan is triggered by (usually self-inflicted) harm and a strong, planned out focus. If he tries to shift for the sake of shifting or with shaken faith, he'll end up pointlessly injured.
- In Fairy Tail, this happens to Mirajane after Elfman tries a full-body Take Over, loses control of himself, and ends up killing their younger sister Lisanna. Mirajane's left unable to use Take Over, because trying to use it reminded her of the incident. When Elfman is threatened by Freed during the Battle of Fairy Tail, Mirajane's desire to protect her remaining sibling reactivates her Demon Take-Over - Satan Soul.
- When Guyver's Sho Fukamachi sees the damaged Guyver II consume its host, he has a Freak Out and can't bring himself to bioboost.
- In episode 8 of the OAV, Guyver won't respond when Sho calls for it after realising that he had killed his father (who had been transformed into an Enzyme II) when the Guyver's autopilot had taken over after Sho himself suffered massive head trauma. Sho's extreme determination to save Mizuki several episodes later is what gets it working again.
- Jewelpet Twinkle: in episode 33, Akari's magical power shuts down when she hears rumors that her love interest Yuuma has something going on with her elder sister. She gets better when they're disproven.
- This is the main conflict of Kiki's Delivery Service; the heroine loses her witch powers and goes through an identity crisis.
- Several characters in Kuroko no Basuke have experienced instances where they're unable to access the Zone because of their mental state. During the Yosen match, Kagami, under the stress of feeling powerless, attempted to forcibly activate the Zone to no avail. Yosen's own ace, Murasakibara, always had the physical potential to enter the Zone, but couldn't do so until he stopped denying his love of basketball. During the final game of the series, Akashi is forcibly ejected from the Zone due to the absolute shock of his trump card being completely stopped, when before then he had never once lost at anything.
- In Mai Hime, a shocking event that greatly distresses Natsuki prevents her from using her powers late in the story. In the anime, it's learning that her mother wanted to sell her to the first District, and she is unable to use her powers until she saves Nao from Shizuru, by which point she fully understands what Shizuru means to her. In the manga, she loses her powers after learning from Nagi that Yuuichi kissed Mai, and gets them back while fighting her mother, after an internal monologue about caring for Yuuichi in her own way.
- In Prétear, The Reveal regarding the Princess of Disaster being a former Pretear shakes Himeno so badly that she can't transform until she manages to recover her resolve with some support from Hayate in the following episode.
- In Puella Magi Madoka Magica, according to supplementary material Kyouko Sakura used to have the power to create illusionary clones of herself, but lost it when her father went insane and slaughtered her whole family.
- During Ronin Warriors, Kento can't summon his Armor of Hardrock after Big Bad Talpa lies to him that the armor is inherently evil.
- In Sailor Moon, Usagi loses the ability to use her Moon Tiara Action spell at one point; it's because she subconsciously doesn't want to be Sailor Moon anymore.
- In Smile Pretty Cure!, Reika lost her powers as Cure Beauty during a fight with Joker because the latter used the former's conflict between quitting being a Cure and disappointing her friends by not studying abroad to drive her into a breakdown and cause her to lose her transformation.
- During Tekkaman Blade, Blade goes into an Unstoppable Rage after exceeding his time limit. When he recovers, he goes into a Freak Out and is so afraid that it will happen again that he can't transform.
- Green Lantern: Kyle Rayner loses his powers when his confidence is shattered by Megaddon.
- Given that the various colored lantern rings are powered by emotion, this can be a pretty common occurrence. A Green Lantern filled with fear and self-doubt, or a Blue Lantern who loses hope, would be left virtually powerless.
- This is especially dangerous for Blue Lanterns- to the point that it even happens to Saint Walker himself.
Films — Live-Action
- During Spider-Man 2, Peter Parker loses his powers because he is unconsciously conflicted about whether or not to continue being Spider-Man. Given the suggestive nature of his powers, the whole thing looks a lot like a man struggling with stress-related impotence. (With the webs being made from a sticky fluid coming out of his body, the parallel is even stronger.) This plot element may have been suggested by a similar plot point in 1964's Amazing Spider-Man Annual #1.
- This happens to Tonks in Harry Potter and the Half-Blood Prince. She loses control of her metamorphmagus powers in her depression over both Sirius' death and her feelings for Lupin. We later learn that this also happened to Merope, when she was under the thumbs of her brother and father, and Dumbledore's sister Ariana after being attacked by a group of Muggle boys.
- In After The Golden Age, this happens to the superhero Typhoon. She loses the ability to use her powers after accidentally killing a police officer.
- In Mercedes Lackey's Heralds of Valdemar, this sometimes happens with Heralds whose Gifts are less tangible, like Empathy and True Magic—if you try to use it and it doesn't work, you start to disbelieve in your Gift a little. This gives Talia trouble, because she's the first Herald in a long time to have Empathy as her primary Gift, and nobody really knows how to train her properly.
- In The Stormlight Archive, Kaladin draws his Surgebinding powers from his bond with Sylphrena, a spirit of pure honor. This means that when he starts behaving dishonorably, the bond weakens and his powers fade.
- This also happens to the title character of Chuck.
- John Locke of Lost loses his Island-restored ability to walk after an incident of self-doubt.
- In The Sentinel this happens to Jim's Sentinel abilities sometimes.
- A variation in The Flash (2014). A Villain of the Week drains Barry's superspeed, leaving him unable to go fast (in fact, Cisco observes that Barry's running speed is lower than a normal person's). Barry tries to shock himself to get his powers back, but it doesn't seem to work. However, when Dr. Wells is about to be killed by the same meta-human, not only do Barry's powers return, but they kick into overdrive, and he ends moving faster than lightning. Wells later observes in a log that his initial speculation that Barry needed to focus on increasing his speed at the expense of his personal relationships and concern for the victims was mistaken. Indeed, Barry's concern for the people he cares about is what fuels his speed.
- In Wild Talents, if you run out of willpower, your powers lose strength and become unreliable.
- Somewhat implied in Mass Effect 2. Your party members gain their final powers after you help resolve their emotional baggage. Of course, while some of them have actual powers (Miranda's Slam, Samara's Reave), others apparently have a psychosomatic power outage on their ability to...use variant ammo types.
- Hazard from the Global Guardians PBEM Universe is a super-athletic martial artist whose powers and abilities depend on the strength of his willpower. Normally, he's able to shrug off things that would completely disable normal people. If his confidence in himself is ever shaken, all his strengths and skills disappear.
- After Zuko does his Heel–Face Turn in Avatar: The Last Airbender, he loses his firebending powers for a while, since he no longer feels the anger (re: Emotional Drive) that fueled them.
- The animated series Generator Rex features a hero whose powers flicker on and off depending on his feelings at the time.
- On Teen Titans, Raven's powers stop working when the monsters in a horror movie they're watching come to life. Except they're actually working perfectly well, just out of her control. She's subconsciously creating the monsters and can't divert her powers to intentional uses until she admits the movie actually scared her.
- Starfire needs to feel happy to fly, so when she's depressed or emotionally confused, she loses the ability to fly.
- In My Little Pony: Friendship Is Magic episode "Bridle Gossip", Twilight Sparkle wakes up in the morning and uses her magic to brush her hair. But the moment she sees her horn is floppy (apparently cursed but really afflicted by exposure to the "poison joke" plant), she drops her brush, and doesn't use her powers again until she is cured.
- Ezra Bridger of Star Wars Rebels had this happen to him in his backstory. He has abnormally strong empathic abilities, even for a Jedi, but after losing his parents and being abandoned he emotionally shut down. It isn't until he bonds with his new family and forgives the person who abandoned him that he regains it.