According to the Navy's official manual, all motion sickness results from a discrepancy between what your body sees and what it feels. It has a lot to do with the inner ear, but we don't need to get too complicated. The conflict between your sight and balance triggers the production of a neurotransmitter, often mistaken by your body as a signal of hallucinogenic poisoning, so your body tries to rid itself of whatever is causing the disorienting condition. This leads to nausea and general discomfort. But you're in luck, here's what to do if you're ...