EE WAS STANDING ON POWDER RIG DECK (APPROX. 3' HIGH), CLEANING OUT AMMONIA NITRATE POT. HE STARTED TO GET OFF THE PLATFORM BY CLIMBING DOWN THE LADDER. IT IS A 2-RUNG LADDER, BEING THE PLATFORM IS ONLY 3' HIGH. NOT KNOWING IT, HE TRIPPED ON THE TOE PLATE OR MISSED THE LADDER. HE FELL ON THE FLOOR ON HIS RIGHT SIDE.