BRIGHT/SUNNY AFTERNOON, TEMP. 82 DEG. EE WAS ATTEMPTING TO GREASE MOTOR ON A 60""-WIDE CONVEYOR. EE PULLED HIMSELF UP APPROX. 2 FEET AND RAMMED HIS HEAD INTO THE MOTOR HOUSING, CAUSING HIM TO LOSE HIS GRIP AND FALL BACK. EE LANDED WITH FULL WEIGHT ON HIS RIGHT LEG, CAUSING SEVERE PAIN AND DISCOMFORT.