I PARKED MY CAR IN RESIDENTIAL NEIGHBORHOOD AND PROCEEDED TO CROSS STREET WITH MY CAR PARKED BEHIND ME. THANKFULLY A MAN FACING CAR YELLED "YOUR CAR!" MY NEW CAR WAS ROLLING DOWN THE STREET BACKWARDS, GAINING SPEED DOWN THE INCLINE, HEADED FOR CURB, SIDEWALK AND HUGE TREE. I CHASED THE CAR DOWN THE STREET, GOT DOOR OPEN, JUMPED INSIDE VEHICLE AS IT WAS MOVING AND SLAMMED ON BRAKE, INJURING MY BACK AND SHOULDER IN THE PROCESS. THE PUSH-BUTTON START ALLOWED CAR TO "FREE-WHEEL" OUT OF CONTROL WHEN TURNED OFF, LEFT IN DRIVE, AND KEY LEFT IN CAR. I AM IN AND OUT OF CAR MANY TIMES A DAY. NO OTHER CAR I HAVE EVER OWNED WILL ALLOW ME, WITHOUT WARNING, TO LEAVE CAR IF LEFT IN "DRIVE". I WAS NOT INFORMED BY TOYOTA THAT PUSH-BUTTON IGNITION WOULD ALLOW MY CAR TO BECOME A POTENTIAL WEAPON, FREE WHEELING, IF LEFT IN DRIVE AND UNATTENDED. I WOULD LIKE THIS SITUATION TO BE REMEDIED TO SAVE LIVES AND PROPERTY DAMAGE. EVEN AFTER GOING THROUGH THIS FRIGHTENING EXPERIENCE, I CANNOT BE SURE IT WON'T HAPPEN AGAIN WITHOUT AN EFFECTIVE WARNING SYSTEM. *TR