Armstrong was involved in several incidents that went down in Edwards folklore or were chronicled in the memoirs of colleagues. During his sixth X-15 flight on April 20, 1962, Armstrong was testing the MH-96 control system when he flew to a height of over (the highest he flew before Gemini 8). He held up the aircraft nose for too long during its descent to demonstrate the MH-96's g-limiting performance, and the X-15 ballooned back up to around . He flew past the landing field at Mach3 at over in altitude, and ended up south of Edwards. After sufficient descent, he turned back toward the landing area, and landed, just missing Joshua trees at the south end. It was the longest X-15 flight in both flight time and length of the ground track.