Background
The pilot, who had recently earned a private pilot certificate, took three passengers for a pleasure flight. At departure, the airplane was loaded to a gross weight exceeding its maximum allowable takeoff weight.
Maneuvers and Engine Failure
During the flight, the pilot conducted low-level dives toward trees, each followed by a rapid pull-up. On the final pull-up, the aircraft encountered negative G forces for a brief period. Immediately afterward, the engine failed. The pilot attempted to restart the engine in flight but was unable to do so.
Forced Landing
A certified flight instructor (CFI) seated in the back seat leaned forward to assist the pilot during the forced landing. The aircraft subsequently struck a small tree, then a large tree, and crashed.