I HAD CRANKED MY JEEP AND NOT SHIFTED INTO GEAR SO IT WAS IN PARK. IT WAS STATIONARY WHEN I JUMPED OUT TO GRAB SOMETHING FROM JUST INSIDE AND HEARD A WEIRD NOISE. I RAN BACK INTO MY GARAGE TO SEE MY CAR ROLLING DOWN AND ACROSS MY FRONT YARD. I THOUGHT SOMEONE WAS TRYING TO STEAL IT SO RAN UP ALONG SIDE THE PASSENGER SIDE AND THAT IS WHEN I SAW NO ONE WAS IN IT. I RAN AROUND TO THE DRIVER SIDE AND TRY TO GET INTO TO STOP IT BUT COULD GET IN WHILE IT WAS ROLLING AND ENDED UP GETTING DRAGGED FOR ABOUT A SECOND AS IT CROSS THE ROAD. MY JEEP KEEP GOING AND END UP HITTING MY NEIGHBORS MAILBOX AND TREE. ONCE MY JEEP WAS STOPPED I OPENED THE DOOR AND NOTICE THE IT WAS IN NEUTRAL. MY GARAGE IS FLAT AND I WAS BACKED INTO MY GARAGE SO THERE IS NO REAL WAY THAT EVEN IF IT WAS IN NEUTRAL THAT IT WOULD HAVE THE MOTION TO MOVE OUT OF MY GAGARGE. I ACTUALLY THINK IT HAD SHIFTED ON ITS OWN INTO DRIVE AND WHEN IT HIT THE TREE I THINK IT POPPED IT INTO NEUTRAL. I WAS LUCKLY NOT TO GET RUN OVER OR ANYONE ELSE WAS NOT INJURIED WHILE MY CAR WAS MOVING OWN ITS OWN.