blood
One of my earliest memories as a little girl is turning on the TV randomly, and seeing someone get killed. The killer then strings the body upside down above a well, or something filled with dust, and then slashes the body's throat; and blood starts pouring into the well, swinging back and forth along with the swinging body. I then turned the tv OFF, and had nightmares for years after that.
Is that scene from this movie??
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I should warn you -- he's a Fourierist.