EMPLOYEE WAS USING A SLEDGE HAMMER TO TAKE PINS OFF TO GET THE LID LOOSE TO CHANGE THE SHOES ON THE VSI OF THE CRUSHER. HE LOST HIS BALANCE AND FELL OFF THE CRUSHER ONTO HIS HAND. HIS WRIST AN D HAND STARTED SWELLING. THE EMPLOYEE DID NOT GOTO THE DOCTOR IMMEDIATELY BECAUSE HE THOUGHT HE HAD ONLY SPRAINED WRIST, BUT WHEN PAIN WORSENED HE SAW A DOCTOR.