Two stunt planes have raced a computer-generated aircraft in the skies above Spain.
The pilots and a gamer reacted to images of obstacles to fly through.
Their real and supposed locations were beamed to one another as part of a video game.
The event was the first trial of ground-breaking technology in preparation for an event being named the Sky Challenge.
Developed by a New Zealand company, it is intended to lead to televised online gaming competitions with hundreds of people racing virtual planes against real aircraft.
Video courtesy of Sky Challenge