I wont play around with those things. but my sister used to. she was kinda messing around with witchcraft for a while and her and her other witchcraft obsessed friend were using the ouija board and they must have pissed something off, cause the little piece that you move around got throw across the room, but not by either of the people using the board.
*edit*
I have attempted to use one before, but it didnt work for me. I guess thats a good thing.
