What happens in this video ?
This P-51 Mustang crashed right next to the crowd at the Reno, Nevada, USA airshow, killing its pilot and ten people on the ground, and also injuring 69 others, including 16 severely. While racing, the P51 lost its left trim tab. This resulted in a sudden climb of the aircraft with a vertical acceleration of 17g which rang the pilot. Unconscious, the pilot was no longer able to control his plane. This ended terribly bad: The P-51 nose dived into the crowd and smashed almost vertically.