As a Moments subpage, all spoilers are unmarked as per policy. You Have Been Warned.
- Moody being forced by Voldemort to beg for the deaths of every single one of his loved ones in order to save them from being left under the cruciatus curse permanently.
- In another of the memories about Voldemort which Harry has opportunity to review, Voldemort casually takes down an entire squad of Aurors by using a Parslmagic Serpensortia to cause scores of cobras to rain down out of the sky on top of them. He does allow one Auror to live in order to "bear witness" to his power, but he then uses a different Parselmagic spell to explode her eyeballs in a way that is impossible for magic to heal. She is said to have later committed suicide the day after Voldemort's defeat.
- Peter Pettigrew unleashing a horde of man-eating rats on the Ministry of Magic during his escape.
- The "toys" that Erasmus Wilkes took great glee in designing, whether they be music boxes that drive people who listen to them into incurable hysterics until their voices break or miniature trains that tunnel into their victims and rip them apart from the inside out. Several hit wizards who badly underestimate Peter Pettigrew are caught by one of the Toymaker's devices and cursed to permanent laughter. Months later, they're all in St. Mungo's still laughing hysterically and would have starved to death but for magical life support.
- Snape being forced to kill his own Advocatus and mutilate the body in order to escape Bellatrix Lestrange's psychic booby traps. For context, the Advocatus manifests as a 16-year-old Lily Evans from before their estrangement!
- Vernon Dursley attempting to kill Harry by feeding him to a swarm of Doxies (which are basically what you would get if you crossed Tinker Bell with a swarm of Piranhas) and being downright gleeful while doing so.
- The Boggart version of Vernon that makes an appearance later on is also traumatizing with how a swarm of Doxies erupt out of its chest to attack Harry.
- At one point, to force Ron's compliance, the Diary causes the arachnophobic boy to hallucinate a swarm of spiders crawling up his throat and and out his mouth until Ron gives in. Later, while possessing Ron outright, the Diary gets him out of the way by trapping him in a nightmare about being buried alive in a coffin full of spiders.
- Luna Lovegood's memory of her mother dying after casting the Imago Dei is terrifying enough, but when Harry and his friends quickly exit the memory, the spell tries to follow them out, despite having been cast more than a decade ago and only being a memory! No wonder knowing that without authorization is an instant kill on sight death penalty sanction.
- Nearly every scene in Year 3 involving that Dementor.
- The Hogsmeade Attack arc includes Peter using a spell from the Anathema Codex to target Theo and several others with sentient Fiendfyre that gleefully promises to burn them slowly.
- Year 4 begins with a harrowing scene (at Euro Disneyland, of all places!) in which a mob of Muggles under the influence of Harry's scar attack him and try to throw him onto the tracks ahead of an oncoming rollercoaster, all the while madly chanting "Kill the Freak!" in French.
- Tiberius Nott planning to marry and impregnate a twelve year old girl in order to seize her inheritance is considered so vile an act that it makes even Peter a bit uncomfortable.
- Pretty much everything involving the Selwyn family. Vampires, cannibals, and creepy twins who are grown rather than born seem to be only the tip of the Iceberg of Horrors hiding within their home at The Abbey of Nightmares. Even Erasmus Wilkes finds them overly creepy.
