EE WAS CLIMBING INTO THE FRONT DRILL CAB AS OPERATOR WAS LOWERING THE LEVEL JACKS. EE WAS STEPPING ON THE FRONT TIRE INSTEAD OF THE STEP PROVIDED BY THE MANUFACTURE. AS THE WEIGHT WAS PUT ON T HE TRUCK SUSPENSION THE SPACE BETWEEN THE STEP AND THE TIRE GREW SMALLER FINALLY PINCHING HIS FOOT BETWEEN THE TIRE AND THE STEP.