I did a Ouija Board when I was 21 whilst I was serving in the British Army,
We were trying to wind up a mate,
So I was reading the Age of Alexander at the time, So I prepared the table with the names of the Generals that were mentioned in the book (demetrius, Phyrus ect) around the edge.
And we told the guy we were trying to wind up (when he asked) that the names were the diffrent names for satan (seems stupid now but it was the Army)
Anyway we got started, and the usual stuff started the glass moved around for a bit, then ther was a banging at the door which we had locked.
Anyway it was the Daily gaurd commander and a couple of the Daily camp Guards, they had recieved a phone call saying there was a rocket in room ** cannot remember the number, this was a single room of one of the guys taking part in the Ouija board.
Anyway the room was checked and there was nothing, The guard left and the "party" broke up for the night
At the time I had a single room also as I was a NCO, and that night was the first time I remember experiancing the "old hag" on my chest, which freaked me out a bit.
It was only years later that I saw a documentary on UK TV (think it was Horizon) about the sleep disorder.
Anyway there were a couple of other things that happened to me that night not anything fantastical, I put them down to my heightend state after waking to the weight on my chest.
Anyway that was my experiance (about 19 years ago now)