first of all i want to say that the ouija bord is complete BS.
second of all, well i used to have a friend who was upcessed with this kind of things
once he invited me to his room, he did the set-up (we put a cup in the middle of candles and some drawings) and he started saying some sorta wierd shit
guess what happened? the cup literally started flying for few seconds and then fell and broke.
you may or may not believe it but well i always believed in supernatural activities after that.