A camera mounted on supersonic parachutist Felix Baumgartner's helmet shows what happened when, tens of thousands of feet above the earth, he went into an uncontrolled spin.
Baumgartner later related that he knew he was in trouble. The spinning could have pushed too much blood into his cranium, causing a blackout or possibly rupturing vessels in the brain. He considered deploying his drogue chute to stabilize but he knew that if he did, the attempt for a supersonic record would be gone forever.
With only seconds to decide, Baumgartner got his fall sorted out, probably aided by entering denser air that enabled greater control from his arms and legs. He did keep accelerating, though, and went on to hit Mach 1.24 before landing safely.