NASA astronaut Mike Fincke, who was evacuated from space due to a medical emergency, has revealed details about his ordeal. He was unable to walk due to severe pain and was called for help from surgeons on the ground. The cause of his illness is still unknown. Finckey, who had been in space for nearly six months, may have suddenly become ill after spending over 500 days without gravity. He plans to return to space in the future.