Nightmare Fuel / The Fairly OddParents!
For context...note 
A colorful, cute cartoon like this can't possibly have moments like this, right?

  • "Beddy Bye" has clearly some of the absolutely most repulsive and horrifying Gross-Up Close-Up in the history of Western Animation, EVER. It's so detailed, jarring and so very graphic for a show with a simplistic animation style. It rivals Squidward's famous "does this look unsure to you?" glare and even the notorious toenail scene from House Fancy, which is saying a lot. But if you even dare to take a glimpse at it, good luck sleeping tonight.
  • There's an episode where Crocker and Norm team up to thwart Timmy by killing him in increasingly ridiculous ways, similar to how the Wile E. Coyote stuff works. Not only is this horrible on its own, but Norm keeps suggesting that Crocker wish Timmy to Mars; when Crocker refuses, Norm takes his lamp and gives it to Timmy, on the condition that his first wish is to send Crocker to Mars, just to show him that it would have worked.
  • "That's Life" is one hell of a Zombie Apocalypse.
    • If you think Eddie is bad, see the ending.
    • That's not the only scary thing about it. How about the creepy echoing of "Summer Camp". It was supposed to be a joke, but it ended up downright terrifying.
  • The episode "Timmy's 2-D House of Horror", Timmy wishes to make a boring 3-D movie volcano into a real volcano, but it erupts and destroys Vicky's house, and her family move in with the Turners, leaving Timmy moving to Doidle's doghouse! Timmy wishes Vicky's house repaired, but his parents don't want Vicky's family to leave and his father's response is to re-destroy Vicky's house with a sledgehammer like a total maniac! So Timmy deliberately wishes for 3-D glasses that would show horrific images so that Vicky and her family would move out of the Turner's home. These images included severed arms in the food and spaghetti and eyeballs. As the purpose of this episode was to show the most frightening images to Vicky's family, the producers HAD to know it was frightening for children and adults.
    Mrs. Turner "Who wants spaghetti and meatballs EYEBALLS?
    • How Vicky sees it as mundane is also terrifying in and of itself. It's already been established she's an Alpha Bitch, but what does this say about her true nature?
  • And there's "Just The Two Of Us", where Trixie goes batshit insane after Timmy wishes for the two to be the only people left on Earth.
  • The look of the Gilded Arches from Arch Enemy, even though he is pretty much the Disco Dan of the series, his face is surprisingly disturbing for being too human like.
  • The climax of the episode, "Action Packed", in which Jorgen uses Cosmo and Wanda's energy to fuel a device that makes his muscles grow even more ridiculously massive. The sight of Cosmo and Wanda's Disney Death is quite unpleasant to behold, but things get really disturbing when Timmy and Jorgen's cat hit the device's reverse-switch; which not only takes away Jorgen's extra muscles, but all of his muscles, reducing him to nothing but skin and bone.
    Jorgen: My muscles! MY BEAUTIFUL MUSCLES!
  • In another episode, because of Timmy traveling to the past to prevent his dad from winning a race and thus Timmy's mom, this results in a dystopian future in which Dad becomes a creepy Stepford Smiler to cope with his loss and forces everyone else to be one as well, whom he calls his "children".
  • The sequence where Crocker had his memory erased as a child. Brr.
  • During the episode, "Talkin' Trash"; The number you have reached is trying to kill you.
  • In the episode "Lights Out", Timmy wishes everything to be dark for 12 hours after Poof's crying keeps him up all night. This causes Cosmo and Wanda to become "Scary Fairies". Not only do they look scary, they're out to get Timmy, and do various things to kill him. And that picture isn't even their scariest form.
    • The fact that the episode takes place in total darkness allows for multiple Gory Discretion Shots where Timmy, his parents, and Mr. Crocker are brutally lacerated by saber-toothed tigers and Cosmo/Wanda in their monster forms.
    • It's not in the traditional sense, but the ending where It's revealed that Cosmo and Wanda did all this to teach Timmy a lesson in not scaring others paints them in quite a horrific light since it implies that they'll pretty much resort to murder just to "teach their loved ones a lesson".
  • Another very disturbing thing is at the beginning of the episode "When L.O.S.E.R.S Attack", when "Timmy" is incinerated by a type of ray gun. Timmy was standing there and screamed NOOOOO! and then there was a big hole and his hat fell to the ground. Granted, it turned out that it was not really Timmy but it was still unnerving seeing a ten year old boy seemingly vaporized.
    • Vicky in the same episode:
  • Super Bike's Yandere side.
    • "Super Toilet!"
    • There's also the fact that he turns into a freaking demon from hell upon being rejected by Timmy.
    • Furthermore, the demonic voice of the bike by Carlos Alazraqui could have been an inspiration for Zoom's voice, the demonic speedster identity of Hunter Zolomon voiced by Tony Todd in Season 2 of "The Flash." Also, the demon-dragon form of the bike is reminiscent of the abomination of steel pictured in the cover of Judah Priest's "Painkiller" album, and acts possessively like the speaker in Judas Priest song "Turbo Lover," and the Stephen King character "Christine."
  • Some of Wanda and Cosmo's evil ex-godchildren, specifically Maryann. What did she do? Wish for the murder of Archduke Franz Ferdinand and his wife. That's right, that little blonde girl caused World War I... and technically World War II, the Cold War, the Vietnam War, the War on Terror etc. This gives her the highest (albeit indirect) bodycount in the entire series, when civilian casualties and victims of the Holocaust are factored in. She is THE reason Real Life is a Crapsack World today, and also the likely reason for the "no killing" rule.
    • Either that or she's just that good at working around Da Rules indirectly. After all, the guy who assassinated Ferdinand was lucky enough to be eating lunch at the right place at the right time when the vehicle came by...
    • Da Rules were written down by the first assembly of the Fairy Council, which was thousands of years ago, so no, there's always been a No Killing rule. Which means that yes, Maryann DID find a way around the rules, which wouldn't even be particularly difficult, she'd just have to wish that, say, the archdukes car had to take a particular path that put him in the path of the assassin.
  • Give us the boy. What, can Timmy's parents not find one freakin' normal babysitter!?
  • The Gigglepies. sure they seem like cute innocent creatures until you discover their Pure Is Not Good nature and their plans of turning Yugopotamia into a nightmarish utopia of happiness and merchandising.
    • Especially the ending! It's mentioned that every time the Gigglepies land on a planet, they start conquering it with their hypnosis. Timmy had successfully vanquished the threat on Yugopotamia, but at the end, they land on our planet, and this time, WE LIKE THEIR CUTENESS!!
    • There's also the way the horde is defeated on Yugopotamia. When Timmy realizes the Gigglepies taste like manure (a rare delicacy for Yugopotamians), Timmy wishes for the Yugopotamians to have empty stomachs. The King roars that he's going to collect them all in his stomach, and the Gigglepies can only scream as they're surrounded. We then cut to the King and Queen, who have become morbidly obese from devouring all of the Gigglepies. They've become so fat that they even collapse their throne. All because they got fat eating a sapient species alive and to (relative) extinction.
  • The episode "App Trap". Oh dear:
    Chatty: Hello, Timmy. I'm your virtual assistant, Chatty. I come complete with games, a camera, an MP3 player, and A BURNING DESIRE TO CONTROL YOUR LIFE.
    Timmy: WHAT?
    Chatty: ...I mean, UNLIMITED TEXTING.
  • In "Timmy's Secret Wish"... you know how it's a Foregone Conclusion that all kids lose their fairy godparents someday? In this episode, it's revealed that all wishes that aren't unwishednote  but ripped away by that rule are thrown into a Physical Hell known as the Hocus Poconos. Including Poof. He was one of Timmy's wishes, after all.
    • Don't forget that Timmy secretly wished that everyone would stop aging....FIFTY YEARS AGO! It's a jarringly sudden and swift deconstruction of the series' Comic-Book Time which is played completely straight for pure shock. When Father Time undoes the wish, it's also shown that Timmy was holding the world back from becoming a futuristic utopia. Because he was that unwilling to be separated from Cosmo and Wanda one day.
  • In "Fairly OddPet", when Timmy and Sparky are in a plane about to crash, Sparky STEALS THE ONLY PARACHUTE AND JUMPS OUT OF THE PLANE WITH SAID PARACHUTE! I want you to keep in mind that fairy dogs CANNOT DIE! So, basically, Sparky just left Timmy to die in a plane going to crash! Luckily, Timmy landed in a pool, but would you imagine if there WAS no water in the pool there, let alone no pool whatsoever? ...Yeah.
    • Sparky can't die but that doesn't mean he can't feel pain; falling from 50 stories is not going to be fun. Of course, the alternative is killing Timmy, so he's still a jackass.
  • There are many scenes in "The Big Fairy Share Scare" where Timmy snaps and yells at Chloe. What makes these scenes odd (and honestly a bit creepy), however, is how Chloe reacts to Timmy... by not reacting to him at all. And by that I don't mean she acts oblivious to Timmy or pretends to not hear him. By that I mean she outright doesn't have any sort of emotional reaction to Timmy yelling at her and berating her. For example, when Timmy and his fairies are in Chloe's room after they escape the center of the Earth when Timmy wished to be as far away from Chloe as possible, Timmy snaps and yells at Chloe. The scene is about six seconds, but for those entire six seconds while Timmy's yelling at Chloe... Chloe does absolutely nothing. She doesn't even react to Timmy yelling at her. She doesn't get mad, upset, afraid, or annoyed at him. In fact, she doesn't even MOVE. She doesn't make eye contact or even BLINK. She just... stands there, completely still, like a fucking doll. And the fact that she LOOKS like a doll and her room looks like something you'd see in a Barbie dollhouse just makes it more jarring.
  • While all of Timmy's stories in "Dimmsdale Tales" are easily Nightmare Retardant there is Fridge Horror surrounding the second story involving a plane in which everyone from the passengers to the pilot are copies of the person you hate most. What the person boarding hated someone who was a homicidal sociopath?
  • In the episode with the voodoo doll expies, Timmy comes dangerously close to being shredded alive, head first.
  • Is anyone else mildly disconcerted by the Hall of Infamy? Sure, Timmy didn't even notice a difference from the Hall of Fame, but an unkempt, decrepit hall filled with single-color background photos of sneering children labeled with nothing but their first name? Brr.
  • The Eliminators from "Wishology!" look quite menacing. Despite sometimes acting like idiots, the Eliminators are quite scary and intimidating, especially when they steal the fake-i-fiers and later kidnap Timmy's family and friends in order to pull several Schmuck Baits on Timmy to get him into the Darkness.
  • People tend to forget that despite Mr. Crocker's status as Butt-Monkey and Laughably Evil, he's actually a very serious threat. The man knows for a fact that fairies are real, he'll stop at nothing to capture one, doesnt care that he'll ruin some kid's life in the process, and his ultimate goal with magic is world domination. Vicky to a lesser extent, while she doesn't know about fairies, her goal is to rule the world as well. We've already seen the consequences of them succeeding in Abra Catastrophe and Channel Chasers, respectivelynote  a Crapsack World ("Universe.") in the style of 1984note  On top of that, they're a teacher and a babysitter who delight in the control they have over helpless children. And Timmy can't get rid of them permanently, because they're part of the reason why he even has fairies.
  • In "Man's Worst Friend"', Anti-Sparky abuses Foop, just like Megatron abusing Starscream in Transformers Prime.
  • The premise of the show is Nightmare Fuel in itself. While well-intentioned, the system that Fairy World has put up to manage the fairy godparents have had disastrous consequences time and time again, an inevitable result when you give kids access to unlimited magic. If it wasn't for the shows Reset Button, the fairies would have caused far more damage than any other magical creature. Cosmo alone destroyed Pompeii, Atlantis AND Xanadu!
  • The video game Breakin' Da Rules had some pretty harrowing moments.
    • Several moments of the game require you to sneak around and avoid an enemy. Most notably, Crocker ends up becoming a Knight of Cerebus as you try to sneak around a large room and avoid him. The music is deadly quiet and suspenseful, and all comedic tones of the game drop harder than a meteor. Worse, you have to catch the five wish stars that are running around the room while still avoiding Crocker. If you've never feared Crocker before, this game will make you fear him.
    • Another enemy you have to escape is Tootie in the penultimate level, "A Dog's Life." While she's still spending the whole time begging you to let her love you (as you're playing as Timmy after he's been turned into a dog), it's still rather frightening to hear the sound of her squeaking toward you.
    • The camping level has you flee through the dark woods at night, trying to hide from the brainwashed Girl Scouts Vicky has serving her.
    • The bathtub level is not only fairly disgusting, but the boss is a monstrous germ that you have to fight off.
    • Infiltrating the Yugopotamian ship as the scope of the level gets bigger and bigger with more threats in your way. Even Timmy gets afraid and Cosmo and Wanda must give him a pep talk.