Incident Overview
A pilot and a passenger conducted a preflight inspection and boarded the airplane for a night departure. After the engine was started, the pilot noticed that the left main landing gear wheel chock had not been removed. The pilot asked the passenger if he could go behind the airplane and pull it away. Before the passenger exited the airplane, the pilot repeated to him, "go to the back of the airplane, do not go to the front."
Sequence of Events
After the passenger exited the airplane, the pilot saw him step toward the front. The pilot screamed, "no, stop," but the passenger was struck by the moving propeller. The passenger subsequently tested positive for marijuana.
Observations
The incident occurred during a night departure. The pilot had explicitly instructed the passenger to go behind the aircraft. The passenger's action of stepping toward the front led to the propeller strike. No other information is available regarding the type of aircraft, registration, location, or extent of injuries.