[[http://www.equestriadaily.com/2011/02/story-rocket-to-insanity.html Rocket to Insanity]] is a ''WesternAnimation/MyLittlePonyFriendshipIsMagic'' grimdark fanfiction which has Rainbow Dash coming under DemonicPossession which gives her [[Fanfic/{{Cupcakes}} horrible nightmares]] and visions of [[spoiler:Pinkie Pie torturing and killing Dash]] causing her to slip slowly into insanity. Needs WikiMagic.

* AllJustADream: The events of ''Fanfic/{{Cupcakes}}'', a dream Rainbow Dash has repeatedly, [[spoiler: causing her to lose her sanity and murder Pinkie Pie.]]
* BrainBleach
* ComicBookAdaptation: You can read it [[http://seventozen.deviantart.com/art/Rocket-to-Insanity-Title-Cover-291311329 here.]]
* DarkFic: If this isn't Grimdark, I don't know what is.
* DeathByIrony: Pinkie Pie is betrayed by the Element of Loyalty.
* '''DemonicPossession''': Rainbow Dash is repeatedly attacked by a demon who shows her terrible visions of a false future, reducing her to near exhaustion and isolation. The demon successfully prods Dash at a spur-of-the-moment decision [[spoiler: into taking a knife and killing Pinkie.]]
* EvilLaugh: [[spoiler: Rainbow Dash at the very end, after killing Pinkie Pie and losing all sanity.]]
* FallenHero
* HeroicBSOD: If you could call it that.
* HeroKiller
* OhCrapThereAreFanficsOfUs
* RevisedEnding: Several, made by a variety of people.
** FanFic/RocketToInsanityAlternateEnding
** Rocket to Insanity: Fall of the Apple Family
** How Friends May Fall
* SanitySlippage: Rainbow Dash. There are simply no words.
-->[[spoiler:'''Rainbow Dash''': ...g-giggle at the ghastly...heehee...s-snortle at the spooOOooky...haha...heheheeheeeehaha! HAHAH! AHAHAHAHA! HAAAAAAAAHAHAHA!]]
* ShoutOut: The unofficial sequel to ''Fanfic/{{Cupcakes}}''.
* StressVomit: Rainbow Dash vomits as she struggles to comprehend the gravity of [[spoiler:Pinkie's murder.]]
* TeamKiller