Frank Kingston Smith of Scottsdale has been a public address announcer at air shows across the country for 34 years, including last Friday's air race in Reno, Nevada.
He was describing the event to thousands of spectators when he noticed something was wrong with one of the planes.
Smith estimated that the plane was falling at about 400 miles per hour, and he told everyone over the speakers to get down.
Smith and Steve Stauverkakis, the other announcer, were 70 feet from the site of the crash. 11 people died and 70 more were injured, but Smith remained unharmed.