EE WAS LEAVING LOAD OUT TO RELIEVE ANOTHER AS DISPATCHER, WHEN CLIMBING TWO STEPS, HIS TOE ON HIS RIGHT BOOT CAUGHT UNDER TOP STEP CAUSING HIM TO TRIP. WHEN HE STARTED TO FALL, HE CAUGHT THE H ANDRAIL AND IT SPUN HIM AROUND CAUSING HIS RIGHTLEG TO HIT THE ANGLE IRON ON THE HANDRAIL.