It wasn't impressive enough that aeronautical engineer and "all-around daredevil" George Plummer could stand on his head on top of a six-foot pole. No, the brash Mr. Plummer - seen here soaring over Grover Hill, Ohio - had to add a rickety old airplane to the mix.
"In spite of the terrific wind that is created by an airplane in flight, Mr. Plummer is able to maintain his balance." George, what were you thinking?
Read the full story in our November 1921 issue: Most Daring Airplane Stunt On Record.