EE WAS OPERATING A CAT773 OFF ROAD END DUMP & REVERSING TO DUMP A LOAD OF SAND WHEN THE INNER FACING SIDE WALL OF THE LEFT FRT TIRE FAILED. THE RESULTING RELEASE OF AIR ROCKED THE OPERATOR IN HIS DRIVERS SEAT, AND DESPITE EAR PLUGS CAUSED DAMAGE TO HIS INNER EAR, LEFT ARM & LEFT SIDE OF BODY.