EMPLOYEE WAS CARRYING A SHEET OF PLYWOOD W/HIS RARM. AS HE WAS LIFTING THE PLYWOOD, HE FELT SOMETHING PULL BEGINNING AT THE R. SHOULDER AND ACROSS THE BACK DIAGONALLY AND DOWN THE L. LEG. HE INITIALLY SAW A CHIROPRACTOR SEVERAL TIMES. HE RETURNED TO WORK 10/29/01 TO 11/12/01. ON NOV12TH HE INJURED IT AGAIN BY BENDING OVER. THE DRBELIEVES HE MAY HAVE PULLED HIS SCIATIC NERVE.