On December 1, 1993, at about 1525 eastern standard time, a Sikorsky H34-G, N8503J, was substantially damaged following a collision with terrain near Walterboro, South Carolina. The commercial pilot received minor injuries in the accident. The helicopter was being operated under 14 CFR Part 133 by Helicopter Lumberjacks of Paragold, Arkansas. Visual meteorological conditions existed at the time, and no flight plan had been filed for the local, logging operation. The pilot stated that while at a hover during logging operations, the throttle stuck at a partial power setting, and he was forced to execute an emergency landing in the trees. The aircraft was substantially damaged during the emergency landing. Inspection of the throttle linkage to the engine following the accident did not reveal any malfunction of the linkage or throttle.