Sequence of Events
Prior to starting the engine, the pilot turned off the fuel selector. During taxi for takeoff, the pilot forgot to turn the fuel selector back on. As a result, the engine lost all power and stopped. The airplane was not equipped with a starter.
For a restart, the pilot hand propped the engine. At that time, the airplane was not securely tied down, and the throttle was not at idle. The engine started and revved up. The pilot attempted to restrain the airplane by holding on to it and was injured in that endeavor.
The unoccupied airplane became airborne and climbed about 200 feet above the ground. Thereafter, it banked right and descended into a corn field next to the airport.