LOL, this makes me laugh about good times! My best friend and I, one time we had a dreaming match and we each had a pair of these rings (I loaned her a pair), we'd always dream wild dreams when we wore them, so we'd compare them and see who had the weirdest. I think we did it for a couple of months. I can't remember why we stopped, but I think we lost them. :D I guess we were just kids and already had a ton of energy, but I don't remember getting sick while using them.