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Nightmare Fuel: "Manos" The Hands of Fate
The "haunting" Torgo theme really is extremely sinister sounding...
For all this movie's faults, and there are a LOT of those, the atmosphere at Casa De Manos is full of dread, every second you're there you get the feeling something's very wrong about this place. It has a similar oppressive feeling of wrongness to that of the house from The Texas Chain Saw Massacre (1974), only with a less immediate and visceral danger.