Just a little side note - In my last stage show, I had volunteers playing a homemade ouija board. I told them all about the haunted history of the building and that someone was murdered there. I gave then names, dates, events and details - even showing where the body was found.
They were then asked to try to contact the person who was murdered there. I had a large table with letters of the alphabet laid out in a ring and black and white photographs of possible murder suspects. An upturned glass was in the middle. The glass, with their finger resting on it, always moved. When I asked the "spirit" to identify the murderer, it moved towards one of the photographs. When I asked it to spell things, it spelled names and relevant information. People were quite shaken by it.
Of course, I had made the entire story up. No one had been murdered there. The names I gave were all ficticious and the photogrpahs had no connection to the building or its past. Yet somehow, we contacted the spirit of a person who never existed and got information about events that never happened. Or we didn't.