THE RIGHT REAR SIDE OF THE EMPLOYEE'S HAUL TRUCK HAD SUNK IN A SOFT SPOT ON THE UPPER ROADWAY. WHILE EMPLOYEE WAS DISMOUNTING THE ACCESS LADDER ON THE FRONT OF THE VEHICLE, HE MISJUDGED THE E XCESSIVE DISTANCE BETWEEN THE BOTTOM RUNG AND THE GROUND, CAUSING HIM TO LOSE HIS BALANCE AND FALL ONTO THE SIDE OF HIS LEG.