Well, you've done it. You've gone and eaten yourself into a food coma. Your belly feels stretched beyond capacity and you can barely move your limbs. The ideal solution is no doubt to surrender to a tryptophan-induced slumber until it all blows over. But since the pleasure of a gastronomic blackout isn't always an option -- your family insists on a holiday round of charades, or your friends don't feel like carrying your limp body around all night -- what's Plan B?