Steve from Austin, who sent me this clip also sent this explanation of what it is. Pretty damn cool:
Every so often, just the right combination of conditions and events occur to create an unbelievable event – in this case an F-14D passing through the sound barrier. Not only were the water vapor, density and temperature just right, but there just happened to be a camera in the vicinity to capture the moment. The F-14D is actually in transonic flight, with normal shock waves emanating from behind the canopy and across the wings and fuselage. The condition will last for only an instant, and once supersonic flow exists completely around the aircraft, sharp-angled sonic cones replace the normal shock waves. The odds of getting a shot like this are staggering. Enjoy…

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