1) THE PILOT'S POOR JUDGEMENT IN BUZZING A RESIDENTIAL AREA, 2) HIS FAILURE TO MAINTAIN AN AIRSPEED ABOVE THE AERODYNAMIC STALLING SPEED, WHICH LED TO A STALL/SPIN, AND 3) THE INABILITY OF THE PILOT TO TAKE REMEDIAL ACTION AND RECOVER FROM THE STALL/SPIN DUE TO INSUFFICIENT ALTITUDE.