US Navy pilot, war veteran, aerospace engineer, astronaut and first man on the moon Neil Armstrong was also an incredible test pilot, with 900 flights in experimental aircraft including the dangerous Lunar Landing Testing Vehicle. On 6 May 1968, he almost died flying one. This is the video of the crash.
The controls on his Lunar Landing Research Vehicle started to go crazy at an altitude of 30m, and the vehicle started to bank dangerously. Armstrong ejected and landed safely, but, according to the post-accident investigation, he would have died had he ejected only half a second later. Learn more here.