No windows. Ever think about what that means? A tilt-wing VTOL like a Federated-Boeing Commuter or a Merlin takes off and climbs like a helicopter ... which means that it generally takes a serious nose-down pitch when it's climbing out. So how does the old sensorium interpret that? The floor's horizontal, chummer—that's what the eyes and the brain say, because floors are always horizontal. But the inner ear says the floor's at least 20 degrees horizontal. It's that mismatch between what your brain knows and what your inner ear's saying that causes serious motion sickness. Typically the cure is to look out the window and get a reality check from the horizon ...