2006 CHEVROLET COBALT SEDAN HAD 2 INCIDENTS OF GOING OUT OF CONTROL 9 DAYS APART. FIRST TIME WAS WHEN CAR WAS PUT IN REVERSE AND SLIGHT TAP OF GAS PEDAL RESULTED IN CAR RAPIDLY REVERSING UNTIL HIT MUD AREA ON GRASS AND LIGHT POLE. SECOND INCIDENT WAS WHEN CAR WAS IN FORWARD AND STOPPED TO OPEN TRUNK. CAR LUNGED FORWARD WITH SUCH FORCE THAT IT WENT THROUGH GARAGE WALL. AIR BAGS DID NOT DEPLOY EITHER TIME. CAR TOWED TO DEALERSHIP. PARTS ORDERED TO REPLACE DAMAGE BUT NOT YET CHECKED OUT MECHANICALLY TO SEE WHAT WENT WRONG WITH FORWARD & REVERSE INCIDENTS AND WHY AIR BAGS DID NOT DEPLOY. *NM