A Christian in my HS tried the Ouija board once and had so many freaky things.....sheets being pulled off her bed while she was awake etc....that she never did it again.
That's not an uncommon story in the reviews posted at Amazon. A friend of mine had a board when I was a kid. I probably would have played had he asked me. Glad I didn't.
My wife played with her sister as a kid and got spooked when the planchet began to move by itself.