Nightmare Fuel

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Nightmare Fuel is the essence of horror itself — it inspires fear into one's very soul and makes them feel Instant Regret for not simply turning around and running home where they're safe when they could. It's almost impossible to erase the imprints Nightmare Fuel leaves on your mind, making it that much more horrific.

Nightmare Fuel can be found nearly anywhere: in books, movies, TV shows, even children's media. What makes it so scary might be its straight-away appearance (what you immediately see) or its deeper meaning that you only get once you really start to think about the context. An example of this is some UnTrashes that are Just For Laughs or not to be thought about too much, like Psycho Love, but have a much worse translation into real life.