Twitch,
I had a friend that got one of those things and loved to paly with it ( the board I mean, LOL) and nothing ever happened utill something happened.
I saw him one day, abiut a week after I had last seen him in TaeKwon-do class ( I was a teacher) and his whoel hair was cut short and all white, when I pressed him about the "dye job" he was visibly shaken and after, when were hanging out after class he told me he had an incident with his board, that all kinds of wierd shit happened and was still happening, that he was thinking of moving and all sorts of stuff.
I of course laughed in his face, thinking he was kidding, next ting you knwo he is crying like a baby !
Freaked me out, babbeling that his hair turned white over noght and all shorts of shit !
He left that day and I didn't see him after, I asked the head instructor what happened and he said, " Don't know, he moved, gave me his forwarding address for a refund of his left over membership and that's it".
He was a die hard atheist.