Laugh, and the world laughs with you. Keep laughing, and the world still laughs with you, but maybe a little less heartily. Laugh some more, and the world starts to look nervous. Make the laughter louder and more insistent, and the world begins to back off. Add a kind of hoarse screeching sound each time you take a breath, and the world tells its family to pack up the picnic things and they'll find a spot further along the beach. Works every time.