EE WAS PULLING ON A HOSE TO CLEAN UP HIS WORK AREA AND FELT A POP IN HIS BACK. HE HAD 4 DAYS OFF OF WORK AND THOUGHT IT WOULD GET BETTER. IT DID NOT AND HE SOUGHT MEDICAL CARE. HE HAD AN MRI O N 7/14/02 - DIAGNOSED WITH MUSCULAR STRAIN. TAKEN OFF WORK & STARTED ON PHYSICAL THERAPY. LDW 7/7/02.