Incident Details
The pilot, who held a commercial certificate and had accumulated 1,620 hours of flight experience, reported that after three unsuccessful attempts to start the engine using the electrical starter, the battery power was almost depleted. The pilot then decided to start the engine by hand propping, without any assistance. After adjusting the throttle and securing the tail of the airplane, the pilot was able to start the engine on the second hand-propping attempt.
Once the engine was running, the pilot readjusted the throttle to an idle setting and unsecured the tail of the airplane. As the pilot was reentering the cockpit, his foot slipped off the step located on the left main landing gear strut. While reaching forward to regain balance, the pilot inadvertently hit the throttle enough to increase the engine's RPM. Subsequently, the airplane started to taxi forward unoccupied.
The pilot was able to re-board the moving airplane and close the throttle to idle, but by that time the airplane had already collided with a fence. No other information about damage or injuries was explicitly stated in the source.