 In 1919 at age 11, Sylvester was tragically killed by a car in Chicago.Glenn L. Martin needed a female parachutist to jump into the opening ceremonies of the new Los Angeles Harbor.Hilder had never jumped before but made a deal to jump twice if she could use Martin's airplanes with flight lessons from her husband.In April 1914 she made two parachute jumps using a static line chute.