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Nightmare Fuel: Nausicaš of the Valley of the Wind
The Giant Warrior◊ in the movie. It gets worse when it begins rotting away and the flesh literally pours off and exposes the bones and skull. To top it off, it shoots once, creating something resembling a nuclear bomb going off.
Not to forget that the Warrior is radioactive, and every minute you spend with him gets you nearer to death.
As if that wasn't enough, Studio Ghibli commissioned a short-animation depicting the Warrior in what is a Prequel to series, showcasing the genesis of the "Seven Days of Fire".
When Nausicaš burns her foot in the Acid Lake, her scream is absolutely soul-wrenching (Japanese-only).
The whole "seeing dead people going into the light while a childish voice sings a disturbing song" is rather unnerving.
Seeing the young Ohmu used as bait is both horrifying and a Tearjerker at the same time.
The Ohmu, period. Despite the appearance of a baby version of them in the end, colossal insect monsters with multiple red eyes mindlessly charging and killing themselves in suicide attacks on cities aren't exactly soothing.
Nausicaš's dream in which she remembered trying to keep an Ohm as a pet, having it taken away and pleading for it not to be killed was both this and tear jerkingly sad.
When Nausicaš and Asbel discover the eradicated city of Pejite, with thousands of dead insects everywhere alongside the occasional human body, and a few dead Ohmu stranded in the city.
Nausciaš going into a berserker state against the Tolmekians who kill her father. Up to this part of the movie, she has been kind and gentle and to see her act like this is really kind of scary. Actually, ANY time she shows actual anger.
The way she yells that she'll kill them is really scary in the English version. This troper never thought Alison Lohman's voice could get that high-pitched.
Nausicaš's reaction doesn't help either. In fact, the only thing that snaps her out of her aggressive state is Lord Yupa getting between her and the guy she was going to run through with a sword.
Some of the insect designs in both manga and movie are really creepy, particularly the flying ringworm thing◊.
The Emperor's flashbacks to his father's death by plastic surgery. As if it wasn't enough to see his father's skin tear open and his organs spill everywhere, he was a child at the time.
Nearly everything involving the Holy Crypt of Shuwa. The dark, organic imagery and the Heart of the Crypt itself are utterly wrong and alien...