I saw a hunchbacked shadow being one night when I was a child. It slowly shuffled past my bed. It looked like an old hag, and it sounded like Darth Vader. It wore a cloak or a hood, like a monk or a witch. It rubbed its hands together as it moved through my room. It never even glanced at me, and it faded or vanished into a wall. I later saw a photo of a nearly identical being on a talk show! BTW, we lived close to Waverly Hills Sanitarium when I saw the dark entity.
They come in different forms or can be essentially the same being in various forms. All cultures know this, so there are a lot of clues out there.
That might be true. Still, it's my personal opinion that they are various entities that probably have different origins. The shadow being, that I saw, looked like the witch from "Snow White". It didn't look like Hat Man or other kinds of shadow people.