If you catch stomach flu (usually a virus in your guts), swallow food spoiled by bacteria, or simply pig out until your body rebels, your stomach will kick into reverse to eject whatever’s causing the trouble. Your guts churn, your head spins, and your throat begin to burn. Before you know it, blaaargh! You’ve launched your lunch! Clammy skin, waves of uneasiness, and a queasy feeling known as nausea usually precede puking, giving you a heads-up to hang your head over the toilet. Motion sickness – a condition brought on by winding roads, rocking boats, or back-to-back rides on the Tilt-a Whirl – can lead to hurling, too.
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