Well, I've never had an experience with the supernatural, but I would still caution anyone who's considering trying out the Ouija Board. Even though alot have left the Borg, I firmly believe that Satan, demons or ghosts or whatever you wanna call them, are real. Yes, we were all instilled with a morbid fear of the demons, but I've seen enough documentaries on TV interviewing many people who are not JWs, and some of them have had really bad experiences with these entities.
The Exorcist is loosly based on a true story and I guess when they were making the movie, wierd shit started happening all the time: fires starting out of nowhere, cast or crew were thrown around by unseen forces. While of course this could be made-up stuff to promote the movie, I think it's worth noting that Linda Blair was in therapy for years after she made that movie.
So please use caution. I think people can get themselves into trouble because of dabbling in stuff that maybe as humans, we shouldn't be.
Just my 2 cents.........