EMPLOYEE WAS HELPING TO PUT HE NORTH FLYWHEEL GUARD ON #1 MILL ROLL. IT WAS LIFTED UP WITH A HOIST AND THEY WERE MOVING THE GUARD TO THE SOUTH END WHEN THE BACK OF THE GUARD SWUNG INTO THE BEA M. EE HAD HIS HAND BETWEEN THE GUARD AND BEAM WHEN THE GUARD STARTED TO SWING EE TRIED TO HOLD IT BACK.