Well it worked for me, too. And I know what you mean. It is hard sometimes in public places, when you find yourself dissolving helplessly in giggles, but you are trying to maintain dignity and decorum so you try to suppress the giggles, and that in itself is pretty funny, so it's a battle lost before it's started, so the other people in the waiting room might as well join you, and then everyone will receive the cardio-vascular benefit, which Science has recently decreed works just as well as exercise.I think I'm so friggin' hilarious. I can seriously just sit still and make myself burst out laughing...