ON AUG 4, 2018, IN VENTURA, CA, AT ABOUT 2:30 PM I WAS DRIVING A PASSENGER TO A MEDICAL CLINIC IN A RENTED TESLA MODEL X. AS I WAS PULLING INTO THE PARKING SPACE THE TESLA RAPIDLY ACCELERATED FORWARD UNEXPECTEDLY. SURPRISED AND SCARED I TURNED THE STEERING WHEEL AS HARD AS I COULD AND PRESSED ON THE BRAKE TO STOP THE CAR TO AVOID THE BUILDING IN FRONT OF ME. EVEN WITH MY EFFORTS OF STOPPING, THE CAR WENT OVER THE CURB ONTO THE SIDEWALK AND THEN OVER A LOW CEMENT WALL AND FINALLY STOPPED NEXT TO THE BUILDING. THIS CAUSED DAMAGE TO THE CEMENT WALL, THE FRONT RIGHT WHEEL WELL AND THE UNDERCARRIAGE OF THE CAR. LUCKILY NO ONE WAS HURT. IF I HADN'T AVOIDED HITTING THE BUILDING OR IF A PERSON HAD BEEN WALKING OR STANDING IN FRONT OF ME ON THE SIDEWALK SOMEONE COULD HAVE EASILY BEEN INJURED. THE POLICE WERE CALLED AND THERE WAS AN INCIDENT REPORT.