Test your logic skills: Human brains need oxygen to function properly. Aerobatic flight is not something most humans experience. Therefore, most pilots are superhuman. Achieving above-the-ordinary pilot skills involves maneuvers that result in high G-forces. Rapid pull-ups can result in a pilot experiencing possible black-outs, while rapid push-over maneuvers can result in a pilot experiencing headache, (_____)-out or even unconsciousness. [Fill in that blank.]
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