I've seen no shadow spirits, or shadow people. However, a beautiful set of stairs, leading up to a beautiful second story. Wanting very much to go up as a child. Asking my mother why we never went up, when older. Answer, it was a one story house. Seeing a bright sparkling light moving about 4 feet off the ground in the middle of the night; attacking me at the speed of light. Clamping onto my head, and trying to gain entry through my ear, by rolling sounds, looking for a combination, throwing me around like a rag doll. Finally releasing me, when entry was not gained. Later, I found out that a lady with 3 children had gone insane forever. I felt that this being was a very old, perhaps from the beginning. And that it had incidious cousin's. The man on the street, talking to himself. The crazy aunt, who lives by herself. I'm not quite sure why this ancient parasite is not better known.