EMPLOYEE WAS STACKING BOXES ON LINE 3. HE STATEDWHILE TWISTING HE SNEEZED AND GOT SHARP PAIN IN HIS UPPER BACK. THE PAIN WENT AWAY WITHIN 5 MINUTES. THE INITIAL INJURY OCCURRED 0N 2-14-00. IT WAS NOT REPORTED UNTIL HE FELT THE SAME PAIN ON 2-15 WHILE DUMPING A BAG.