A PIECE OF SLAB END WEIGHING ABOUT 75# WAS SITTING ON A SET OF ROLERS ABOUT 42"" HIGH. EE PICKED UP THE PIECE AND PUT IT ON A PALLET. AS HE BENT OVER, HE FELT PAIN IN HIS BACK. HE CONTINUED TO WORK THE REST OF THE DAY. THE NEXT DAY EE REPORTED THE ACCIDENT AND REPORTED OFF WORK.