History NightmareFuel / ScoobyDoo

* The Ghouls getting [[BrainwashedAndCrazy Revoltized]] in ''WesternAnimation/ScoobyDooAndTheGhoulSchool'', specifically their expressions: Sibella's eyes [[WideEyesAndShrunkenIrises shrink as if she were going feral]], Elsa looks like her mind just got fried, Phantasm quickly loses her GenkiGirl grin and scowls for the first time in the whole movie and Winnie howls for some indescernable reason. Elsa, Winnie and Tanis were freed early, but Sibella and Phanty remained under the spell longer. The former was freed by Tanis and apparently needed a few seconds to shake off the effect. Phanty, being under the longest, probably would've had more permanant effects had Scooby not knocked over random chemicals in the potion.

* The musical cue that accompanies Captain Cutler's appearances in "A Clue for Scooby Doo".
* One from the classic show; episode 15 of the first season of ''WesternAnimation/ScoobyDooWhereAreYou'' features the Spooky Space Kook. The opening of that episode... We have an alien, dilapidated ship drifting eerily across the screen, and then the titular Space Kook, a lumbering spacesuit with a glowing, flickering skull inside its translucent dome, approaches, staring right into the viewer's eyes as it gives out this [[https://www.youtube.com/watch?v=swhAv9VcBWc horrible shrieking cackle]].
** Making things worse? The sound of the alien ghost-ship [[HeyItsThatNoise can be recognized as]] the "electronic rattlesnake" noise from ''Film/WarOfTheWorlds1953''.
** The sight of a walking skeleton in a spacesuit might also be [[HarsherInHindsight scarier in hindsight]] for [[Recap/DoctorWhoS30E8SilenceInTheLibrary Who]][[Recap/DoctorWhoS30E9ForestOfTheDead vians.]]
* If you think about it, several of the villains in the '''classic''' series showed a willingness to kill. The Ghost Clown hypnotized Scooby into doing the high-wire act, and then broke the trance when Scooby was still high above the ground. He also hypnotized Shaggy into being a lion-tamer, AND clearly said Shaggy would be a snack for the lion when he tried to break the trance. He also hypnotized Daphne into performing a circus stunt, and she changed clothes to do so. Crossing into FridgeHorror territory, does it seem likely that a man willing to feed Shaggy to a lion would have spared Daphne's modesty as she changed clothes? The villains in "Mystery Mask Mix Up" were explicitly going to BLOW UP Shag and Scoob. In "To Switch a Witch", the townsfolk decide that a friend of the gang is a witch and were going to torture her to make her confess, Salem-style. Shaggy and Scooby take the brunt of this, which could have gone worse were they not MadeOfIron. And the townsfolk never were shown to apologize for this when proven wrong, or even prosecuted for what amounts to assault. And that's not even counting the number of adult male ''convicted criminals'' returning for stolen loot that they'd hidden having teen girl Daphne '' '''bound and gagged''' ''!

** The sight of a walking skeleton in a spacesuit might also be [[HarsherInHindsight scarier in hindsight]] for [[Recap/DoctorWhoNSS4E8SilenceInTheLibrary Who]][[Recap/DoctorWhoNSS4E9ForestOfTheDead vians.]]

** The sight of a walking skeleton in a spacesuit might also be [[HarsherInHindsight scarier in hindsight]] for [[Who Recap/DoctorWhoNSS4E8SilenceInTheLibrary]][[Recap/DoctorWhoNSS4E9ForestOfTheDead vians.]]

** Making things worse? The sound of the alien ghost-ship [[HeyItsThatNoise can be recognized as]] the "electronic rattlesnake" noise from ''Film/WarOfTheWorlds1953''.

* ''WesternAnimation/TheScoobyDooProject'' [[http://www.youtube.com/watch?v=uMsA6_Qh_jw [1]]]. It's a parody of TheBlairWitchProject. That should show give you a good idea. [[spoiler:What makes it worse is it's implied the gang ''died'' at the end]].

* The townsfolk (plus Daphne) turning into werewolves in the first episode of ''TheThirteenGhostsOfScoobyDoo''.
* The musical cue that accompanies Captain Cutler's appearances in "A Clue for Scooby Doo".

* WebVideo/TheScoobyDooProject [[http://www.youtube.com/watch?v=uMsA6_Qh_jw [1]]]. It's a parody of TheBlairWitchProject. That should show give you a good idea. [[spoiler:What makes it worse is it's implied the gang ''died'' at the end]].

* {{The Scooby Doo Project}} [[http://www.youtube.com/watch?v=uMsA6_Qh_jw [1]]]. It's a parody of TheBlairWitchProject. That should show give you a good idea. [[spoiler:What makes it worse is it's implied the gang ''died'' at the end]].

* [[http://www.youtube.com/watch?v=uMsA6_Qh_jw The Scooby Doo Project]]. It's a parody of TheBlairWitchProject. That should show give you a good idea. [[spoiler:What makes it worse is it's implied the gang ''died'' at the end]].

* One classic ad on CartoonNetwork featured characters from WesternAnimation/ScoobyDoo: Shaggy showed up in a spooky castle calling out, "Scooby-Doo! Where are you?" This cut to Scooby on a tropical beach, saying, "Right here, Raggy! On Rartoon Network!" What was scary about it was not only the notion that Scooby would desert his friends in the middle of a case, but also the fact that Shaggy was barely animated at all, paralyzed and semi-slouched in seeming defeat as he called for help. It was ''haunting.''

* The townsfolk (plus Daphne) turning into werewolves in the first episode of ''TheThirteenGhostsOfScoobyDoo''.

* One classic ad on CartoonNetwork featured characters from WesternAnimation/ScoobyDoo: Shaggy showed up in a spooky castle calling out, "Scooby-Doo! Where are you?" This cut to Scooby on a tropical beach, saying, "Right here, Raggy! On Rartoon Network!" What was scary about it was not only the notion that Scooby would desert his friends in the middle of a case, but also the fact that Shaggy was barely animated at all, paralyzed and semi-slouched in seeming defeat as he called for help. It was ''haunting.''

* [[http://www.youtube.com/watch?v=uMsA6_Qh_jw The Scooby Doo Project]]. It's a parody of TheBlairWitchProject. That should show give you a good idea. [[spoiler:What makes it worse is it's implied the gang ''died'' at the end]].

* [[http://www.youtube.com/watch?v=uMsA6_Qh_jw The Scooby Doo Project]]. It's a parody of TheBlairWitchProject. That should show give you a good idea. [[spoiler:What makes it worse is it's implied the gang ''died'' at the end]]
* ''ScoobyDooOnZombieIsland'' is horrific. It's full of BodyHorror.
** The scene where Shaggy and Scooby are [[spoiler: nearly drained of their life force by the cat-women.]]
** This WhamLine:
-->'''Daphne:''' You won't get away with this.
-->'''Simone:''' I've been getting away with it for [[spoiler: ''200 years! (cue tramsformation'']]

* After watching ''Vampire Bats and Scaredy Cats'' (''The Scooby-Doo Show''), this troper, as a young child, had to sleep with a full head of garlic on her nightstand. ''For a month''. Literally had nightmares about vampires coming to kill her.

* ''ScoobyDooOnZombieIsland'' is horrific. It's full of BodyHorror.

* [[http://www.youtube.com/watch?v=uMsA6_Qh_jw The Scooby Doo Project]]. It's a parody of TheBlairWitchProject. That should show give you a good idea.
* ''ScoobyDooOnZombieIsland'' is horrific. It's full of BodyHorror.

* ''Scooby-DooOnZombieIsland'' is horrific. It's full of BodyHorror.

* After watching ''Vampire Bats and Scaredy Cats'' (''The Scooby-Doo Show''), this troper, as a young child, had to sleep with a full head of garlic on her nightstand. ''For a month''. Literally had nightmares about vampires coming to kill her.