"There is only one pilot on the aircraft and if he is temporarily disorientatde he could lose sight of where we're going and the worst case scenario would be the aircraft would have come down, " he added.

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Instead, it leads us to a ghostly sight: the rusting chassis of a high-wing aircraft, crashed into the trees many years ago by some zoologists.

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In the United States, people can fly model aircraft without approval from the Federal Aviation Administration if they keep the drone in line of sight, lower than 400 feet above ground and away from airports and air traffic.

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The Lexington Institute's Loren Thompson says those mishaps usually result from a simple break in the line-of-sight connection between a plane and the satellite that controls it--often when one of the aircraft's own wings maneuvers into the path of the signal.

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