HIGH DENSITY ALTITUDE CONDITIONS PREVAILED AT THE TIME THE PILOT ATTEMPTED A TAKEOFF. IN ADDITION, THE AIRCRAFT WAS WITHIN 25 POUNDS OF MAXIMUM GROSS WEIGHT. THE AIRCRAFT WAS OBSERVED CLIMBING TO ABOUT 100 FEET. THE AIRCRAFT THEN BEGAN LOSING ALTITUDE, ENTERED A STEEP BANK, AND IMPACTED THE GROUND IN A NEAR VERTICAL ATTITUDE. DENSITY ALTITUDE WAS 9,100 FEET.