August 6th, 1955; As part of the Dash 80's demonstration program, Boeing invited representatives of the Aircraft Industries Association (AIA) and International Air Transport Association (IATA) to the Seattle's 1955 Seafare and Gold Cup Hydroplane Races held on Lake Washington

The Dash 80, Boeing's newest and biggest thing, was scheduled to perform a simple flyover. At the controls was Chief Boeing test pilot Alvin "Tex" Johnston, ex barnstormer, civilian flight instructor, U.S. Army Air Corps Ferry Command pilot, flight test engineer and winner of the Thompson Trophy at the 1946 National Air Races. (Alvin earned his nickname "Tex" because of his unique flight gear, consisting of cowboy boots and a Stetson hat)
Boeing Dash 80

Tex had other plans. As Boeing's pride and joy, approached low over Lake Washington, in front of 250,000 people, including several of the nation's top aviation executives, watched as the Dash 80 pulled nose up and gracefully entered a barrel roll, causing the crowd to drop into silence.