VEH# 1 WAS EXITING BURBANK AVE TURNING LEFT ONTO COLONEL JOHN GARDNER WHEN THE FLOOR MAT BECAME STUCK' UNDER THE GAS PEDAL,CA;USING THE VEHICLE TO RACE FORWARD.MCC TURNED THE WHEEL BUT DROVE ACROSS THE FRONT LAWN AT 140 CJG . VEHICLE THEN WENT ACROSS THE STREET INTO THE CIRCULIAR DRIVEWAY AT CJG STRIKING SEVERAL LANDSCAPING OIERS , KNOCKING STHEM ON THE GROUND. THE VEHICLE THEN WENT THRU AN 8! FOOT SECTION OF SPLIT RAIL FENCE AND RAN OVER A AIL BOX POST WITH 3 MAILBOXES ON THE PROPERTY ON THE PROPERTY OF133 CJG. VEHICLE THEN CROSSED STHE STREET AND STRUCK A TREE CAUSING EXTENSIVE FRONT END DAMAGE.