A declassified Air Force video from May of this year shows the moments after an Arizona Air National Guard pilot on a training flight passed out during a high-speed turn. He was rendered unconscious by forces that exceeded eight times the Earth’s gravity. His F-16 fighter dove at a 55 degree angle toward the ground at 587 knots (about 675 miles per hour) with full afterburner engaged.

But the video has a happy ending.