THE PILOT STATED THAT HE TOOK OFF FROM RUNWAY 36, THEN MADE A LEFT TURN. DURING THE CLIMBING TURN, THE ENGINE LOST POWER. THE PILOT STATED THAT BECAUSE THERE WERE NO CLEARINGS AHEAD, HE TRIED TO RETURN TO RUNWAY 5. HOWEVER, AS HE ATTEMPTED TO LAND FROM OVER TREES, THE AIRPLANE STALLED AND DESCENDED TO THE RUNWAY. POSTACCIDENT EXAMINATION OF THE AIRCRAFT DID NOT DISCLOSE EVIDENCE OF MECHANICAL MALFUNCTION.