INJURED WAS CLIMBING UP ONTO THE DOZER & HAD A FLASHLIGHT IN HIS RT. HAND. HE STEPPED UP ONTO THE TRACK & ATTEMPTED TO GRAB ONTO A HAND HOLD WITH HIS RIGHT HAND BUT MISSED CAUSING HIM TO FALL APPROX. 4'TO THE GROUND. HE FELL ONTO HIS LEFT SIDE CAUSING BRUISING TO HIS RIB AREA.