This is cool and a fooler, and don't let the price fool you, either. I bought it just for the
hypnotic disk (nostalgia from when I was a kid, I guess), but this little trick actually does what
it says, and you can kind of start and end totally clean, if you're sly.
I only gave it 4
stars because the cool disk seems to be only gimmicked on one side.
Thanks China!