Lol, well, well, well, it seems I'm not the only one that does this, it doesn't do any harm to the body, but it will leave your body aching a little cause your lying their stiffly. My dreams can be so real and controlling it is not a problem with me, I started this when I was little, after the time I fell off the top bunk and landed on my head on the wooden floor, after that I try not to move as much in my sleep.