THE AIRCRAFT REPORTEDLY ASSUMED AN ABRUPT NOSE HIGH ATTITUDE DURING ITS INITIAL CLIMB FOLLOWING TAKEOFF. THE PILOT STATED HE MADE THE INITIAL LEFT DEPARTURE TURN FROM THE AIRPORT AND THEN REALIZED HE COULD NOT RELEASE THE ELEVATOR BACK PRESSURE HE HAD USED DURING THE TURN. THE AIRCRAFT STALLED AND ENTERED A SPIN. THE PLT REDUCED POWER AND EXTENDED THE FLAPS AND AT THAT TIME REGAINED ELEVATOR CONTROL. HE PLACED THE ACFT INTO A NOSE UP ATTITUDE BUT WAS UNABLE TO STOP THE DESCENT BEFORE GROUND IMPACT OCCURRED. THE ACFT HAS NOT BEEN EXAMINED TO DETERMINE WHAT CAUSED THE REPORTED ELEVATOR CNTL PROBLEM SINCE IT IMPACTED IN A SWAMP AND WAS DESTROYED. TO DATE, 3-4-86, THE WRECKAGE HAS NOT BEEN RECOVERED AND PROBABLY WILL NOT BE RECOVERED. A CRAWFISH BROIL WAS IN PROGRESS AT THE APRT FROM WHICH THE ACFT HAD JUST DEPARTED. CRAWFISH AND BEER WAS BEING SERVED. THE PLT HAD BEEN AT THE ARPT ABOUT AN HR,HOWEVER, HE STATED HE DID NOT PARTICIPATE IN THE FESTIVITIES. NO TOXICOLOGY EXAMINATION OF THE PILOT WAS CONDUCTED.