What is the most terrifying tale, folklore or urban legend that you’ve ever heard?

I can’t remember the name of it, but there is a beautiful woman in Filipino folklore who detaches her torso from her lower body at night. Her top half apparently flies around, landing on rooftops where pregnant women sleep. It has a tongue that reaches down into the pregnant woman’s belly button and eats her unborn child. The only way to kill it is to find its lower half and sprinkle it with salt.