The 2012 horror film The Possession draws inspiration from classic possession movies like The Exorcist, telling the story of a child overtaken by a demon released from an antique box. That box was supposedly based on a real object discovered in 2001 by a man named Kevin Mannis, who claimed it once belonged to a Polish Holocaust survivor who warned it contained a dybbuk, a malicious spirit from Jewish folklore. After opening the box, Mannis said he experienced violent nightmares, unexplained brui