1 1/8"" WRENCH WAS USED TO UNLOOSEN A BOLT ON SNUBBER PIN TO REPLACE RUBBER BUSHING. WHILE PULLING UP ON THE WRENCH TO BREAK IT LOOSE EMPLOYEE FELT A POP IN HIS BACK. ALTHOUGH HE WAS INJURED ON 1/4/03 IT DID NOT BECOME RECORDABLE UNTIL 1/16/03 WHEN THE EMPLOYEE REQUESTED TO GO THE CLINIC.