History NightmareFuel / MyLittlePonyTheMentallyAdvancedSeries

** It's heavily implied that not only is the book a representation of Celestia's in-universe foalhood[[note]]Complete with an abusive version of Lauren Faust's ponysona as her mother[[/note]] as well as a record of an abusive foalhood for Luna, but Yellow Star is Celestia's childhood prediction of the tyrant that she herself would become, just ''even worse''. Her speech to Twilight in the end is a warning filled with FridgeHorror:

** The book paints a very disturbing picture of how Celestia grew up and how she viewed the world as a foal. She was raised as an omnipotent psychopath by her mother, who groomed her for a world where Yellow Star was always on top and made all the rules of the world. She played games with ponies where she made the rules, with Equestria itself as a giant dollhouse and the population as dolls. Today, Celestia is ''still'' doing what she was raised to do. As for their father, he's implied to be an EldritchAbomination with his own plans for the world; not only does he live outside the known universe, but he promises to return when the stars align. Although he disapproves of his wife's abuse of Silver Crescent, Twilight finds a diary page with words scratched out on purpose by Yellow Star. Yellow Star quickly confirms that her mother died shortly afterwards, and believes that her 'father' is a monster pretending to be her father.

* Yellow Star slowly BrainWashing Twilight into obsessing over her book and coercing her into doing...''[[HiddenAgendaVillain something]]." At one point, she casually ''takes off Twilight's horn and puts it on herself'' to become an alicorn, with Twilight raising no objections.

* Yellow Star slowly BrainWashing Twilight into obsessing over her book and coercing her into doing... ''[[HiddenAgendaVillain something]]''...
** The only reason her plan failed was because Twilight accidentally set fire to the barn they were in. Whatever it was she was trying to do, Yellow Star [[NearVillainVictory came really close to doing it]]. It's pretty telling that ''Celestia herself'' came to see what happened.

** With the surprise presence of Yellow Star's 'father', it paints a very disturbing picture of how Celestia grew up. She was raised as an omnipotent psychopath by her mother, who groomed her for a world where Yellow Star was always on top and made all the rules of the world. She played games with ponies where she made the rules, with Equestria itself as a giant dollhouse and the population as dolls. Today, Celestia is ''still'' doing what she was raised to do. As for their father, he's implied to be an EldritchAbomination with his own plans for the world; not only does he live outside the known universe, but he promises to return when the stars align. Although he disapproves of his wife's abuse of Silver Crescent, Twilight finds a diary page with words scratched out on purpose by Yellow Star. Yellow Star quickly confirms that her mother died shortly afterwards.

** Of course, while the above ''is'' an allegory for Lauren Faust and Hasbro, in-universe, Yellow Star is trying to make Twilight summon ''something.'' We don't know if it's her, who can only be seen by Twilight, or if it's her father, but whatever it is, it is ''not'' meant to enter Equestria.

** With the surprise presence of Yellow Star's 'father', it paints a very disturbing picture of how Celestia grew up. She was raised as an omnipotent psychopath by her mother, who groomed her for a world where Yellow Star was always on top and made all the rules of the world. She played games with ponies where she made the rules, with Equestria itself as a giant dollhouse and the population as dolls. Today, Celestia is ''still'' doing what she was raised to do. As for their father, he's implied to be an EldritchAbomination with his own plans for the world; not only does he live outside the known universe, but he promises to return when the stars align. Although he disapproves of his wife's abuse of Silver Crescent, Twilight finds a diary page with words scratched out on purpose by Yellow Star:

** Of course, while the above ''is'' an allegory for Lauren Faust and Hasbro, in-universe, Yellow Star is trying to make Twilight summon ''something.'' We don't know if it's her, or if it's her father, but whatever it is, it is ''not'' meant to enter Equestria.

PONIES DID NOT BECOME PONIES

** With the surprise presence of Yellow Star's 'father', it paints a very disturbing picture of how Celestia grew up. She was raised as an omnipotent psychopath by her mother, who groomed her for a world where Yellow Star was always on top and made all the rules of the world. She played games with ponies where she made the rules, with Equestria itself as a giant dollhouse and the population as dolls. Today, Celestia is ''still'' doing what she was raised to do. As for their father, he's implied to be an EldritchAbomination with his own plans for the world; not only does he live outside the known universe, but he promises to return when the stars align. Although he disapproves of his wife's abuse of Silver Crescent, Twilight finds a diary page with crossed out words scribbled over in ominous red:

** It's heavily implied that not only is the book a representation of Celestia's in-universe foalhood, but Yellow Star is Celestia's childhood prediction of the tyrant that she herself would become, just ''even worse''. Her speech to Twilight in the end is a warning filled with FridgeHorror:

** The terrifying implication that Yellow Star is Celestia's childhood prediction of the tyrant that she herself would become, but ''even worse''. And with her speech at the end, she has great reason to fear Yellow Star's motives as what seems innocent to a child, is horrifying to an adult.

** The Mentally Advanced version of Celestia is much, ''much'' scarier than her canon counterpart. She's a godly dictatorial ruler who never suffers even the slightest insubordination, ruling over Equestria with an iron hoof while rarely showing any concern for the ponies beneath her.

** The characters wondering around the haunted area.

** The only reason her plan failed was because Twilight accidentally set fire to the barn they were in. Whatever it was she was trying to do, Yellow Star [[NearVillainVictory came really close to doing it]]. It's telling that ''Celestia herself'' came to see what happened.

** She accidentally gets [[spoiler: Veronica and Rex]] killed, after stumbling into a field [[DemonicSpider full of Cazador's.]] This leaves her running around all alone, in a place full of one of the Mojave Wasteland's worst predators in dark night, like a confused child.

** Twilight's [[MyLifeFlashedBeforeMyEyes moment before that]], isn't exactly pretty itself. See the TearJerker page.

** Twilight's NightmareSequence in ''Rainbow Dash Presents: Haunting Nightmare''.
* Rainbow Dash Presents: The Haunting Nightmare, is this in general. As despite remaining a parody, it ''is'' based on a horror story and introduces the series first KnightOfCerebus. Such moments include"

** "Mrs. Buzzy" taking the guise of one of Twilight's old childhood toy, to put her into a LotusEaterMachine and brainwash her into helping torment the others.
** Applejack and Rarity being chased by [[EldritchAbomination Smarty Pants]] during his VillainSong.
*** If the fact that the two were genuinely scared for their, wasn't enough, the scene also shows Rarity ''tripping Applejack'' [[DirtyCoward to save her own sorry hide]], while only being sorry that her plan didn't work. Rarity has always been a JerkAss who hated Applejack, but now we know she would actually get someone killed, just to save herself.
* Yellow Star BrainWashing Twilight into abscessing over her book and unknowingly almost helping her do... ''[[HiddenAgendaVillain something]]'' .. that was probably not good.
* Rainbow often finds herself in this, during her Let's Ramble Over Fallout New Vegas videos. Note wordy are:
** Rainbow accidentally gets [[spoiler: Veronica and Rex]] killed, after stumbling into field [[DemonicSpider full of Cazador's.]] This leaves her running around all alone, in a place full of one of the Mojave Wasteland's worst predators in dark night, like a confused child.
** Later, after having a particularly bad day in the waste, she is lamenting about how bad this day has been, only to make the unfortunate mistake of going into a [[SchmuckBait certain bunker]], where she is [[MoodWhiplash immediately gassed and wakes up in the hellish landscape]] that is The Sierra Madre. So horrified, she wonders if she had died and gone to {{Hell}}, when an imposing holographic figure appears and informs her that she is in a places [[DeathWorld pumped full of a poisonous cloud that is slowly killing her]] and he has placed an explosive color on her, that he will use to kill her, if she does not serve his EvilPlan. Things only get worse over the next few episodes.

* Rainbow often finds herself in this, during her Let's Ramble Over Fallout New Vegas videos. Not wordy:

* Yellow Star BrainWashing Twilight into abscessing over her book and unknowingly almost helping her do... ''[[HiddenAgendVillain something]]'' .. that was probably not good.

* Yellow Star BrainWashing Twilight into abscessing over her book and unknowingly almost helping her do... ''[[HiddenAgendVillain something]]'' .. that was probably not good.

*** If the fact that the two were genuinely scared for their, wasn't enough, the scene also shows Rarity ''tripping Applejack'' to save her own sorry hide, while only being sorry that her plan didn't work. Rarity has always been a JerkAss who hated Applejack, but now we know she would actually get someone killed, just to save herself.

*** Applejack and Rarity being chased by [[EldritchAbomination Smarty Pants]] during his VillainSong.

* In her Let's Ramble Over Fallout New Vegas videos, Rainbow accidentally gets [[spoiler: Veronica and Rex]] killed, after stumbling into field [[DemonicSpider full of Cazador's.]] This leaves running around all alone, in a place full of one of the Mojave Wasteland's worst predators in dark night, like a confused child.
* Later, after having a particularly bad day in the waste, she is lamenting about how bad this day has been, only to make the unfortunate mistake of going into a [[SchmuckBait certain bunker]], where she is [[MoodWhiplash immediately gassed and wakes up in the hellish landscape]] that is The Sierra Madre. So horrified, she wonders if she had died and gone to {{Hell}}, when an imposing holographic figure appears and informs her that she is in a places [[DeathWorld pumped full of a poisonous cloud that is slowly killing her]] and has placed an explosive color on her, that he will use to kill her, if she does not serve his EvilPlan. Things only get worse over the next few episodes.

Celestia's appearance in episode 8. With ominous music playing in the background, her [[EvilSoundsDeep deep, threatening]] voice, and Twilight literally ''screaming in terror'' in her head while [[StepfordSmiler smiling]], it's hard not to fear her.

* Later, after having a particularly bad day in the waste, she is lamenting about how bad this day has been, only to make the unfortunate mistake of going into a [[Schmuck Bait certain bunker]], where she is [[MoodWhiplash immediately gassed and wakes up in the hellish landscape]] that is The Sierra Madre. So horrified, she wonders if she had died and gone to {{Hell}}, when an imposing holographic figure appears and informs her that she is in a places [[DeathWorld pumped full of a poisonous cloud that is slowly killing her]] and has placed an explosive color on her, that he will use to kill her, if she does not serve his EvilPlan. Things only get worse over the next few episodes.

* Later, after having a particularly bad day in the waste, she is lamenting about how bad this day has been, only to make the unfortunate mistake of going into a [[ScmuckBait certain bunker]], where she is [[MoodWhiplash immediately gassed and wakes up in the hellish landscape]] that is The Sierra Madre. So horrified, she wonders if she had died and gone to {{Hell}}, when an imposing holographic figure appears and informs her that she is in a places [[DeathWorld pumped full of a poisonous cloud that is slowly killing her]] and has placed an explosive color on her, that he will use to kill her, if she does not serve his EvilPlan. Things only get worse over the next few episodes.

* Later, after having a particularly bad day in waste, she is lamenting about how bad this day has, only make the unfortunate mistake of going into a [[ScmuckBait certain bunker]], where she is [[MoodWhiplash immediately gassed and wakes up in the hellish landscape]] that is The Sierra Madre. So horrified, she wonders if she had died and gone to {{Hell}}, when an imposing holographic figure appears and informs her that she is in a places [[DeathWorld pumped full of a poisonous cloud that is slowly killing her]] and has placed an explosive color on her, that he will use to kill her, if she does not serve his EvilPlan. Things only get worse over the next few episodes.

* In her Let's Ramble Over Fallout New Vegas videos, Rainbow accidentally gets [[spoiler: Veronica and Rex]] killed, after stumbling into field full of Cazador's. This leaves running around all alone, in a place full of one of the Mojave Wasteland's worst predators in dark night, like a confused child.