Self-inflicted pawnage.

On 21 September 1956, test pilot Tom Attridge was flying Grumman’s new F-11F-1 Tiger. He fired a burst from his 20mm cannon while diving and accelerating. The cockpit was then struck by an outside object. Attridge immediately radioed that he was returning to base. While attempting to land, the jet lost power and crash-landed on the runway. Attridge, thankfully, escaped safely. A subsequent examination found three bullet impacts and one intact 20mm bullet in the plane. Attridge had managed to shoot his own fighter down.