Yes, they vibrate, these
pancakes exercise machines. That's all--they vibrate and you stand on them. Or dance. Or something. Not Pepsi Blue, I'm just sort of weirded out. It probably works, but <big>$$</big> worth? Couldn't one just surf?
Bonus points and a coveted No Prize for anyone who remembers the "vibrates" and "Pepsi Blue" mêmes. And added kudos for anyone who remembers what a "No Prize" was.