There's a platform, you stand on it, up from the plateform stands a pole with a big electric motor on it. You strap yourself to it, turn it on, and it jiggles your midsection violently. Like so:
I gave it a shot at the store. It was scary. But strangely satisfying. That's me in the picture. I was wearing a shirt and shoes though. And I don't have a mullet. Yet.
So the question is: What are these things called? Should I have bought it for $40? Will I die now that I've used it? Thank you.