I PURCHASED A HEAVY LARGE STEEL CABINET WHICH WAS LOADED ONTO MY PICKUP TRUCK. WHEN I ARRIVED AT HOME, I WAS GOING TO LIFT THE CABINET OFF OF MY TRUCK WITH A JOHN DEERE LOADER. I PARKED MY TRUCK ON MY LAWN. I THEN DROVE THE LOADER UP TO THE TRUCK ON THE DRIVER'S SIDE. I RAISED THE BUCKET OF THE LOADER OVER THE CABINET AND CONNECTED IT TO THE CABINET WITH A CHAIN. I RAISED THE BUCKET UP UNTIL THE CABINET WAS ABOUT 4 INCHES OFF THE TRUCK BED. I GOT OFF THE LOADER AND PROCEEDED TO DRIVE MY TRUCK FORWARD OUT FROM UNDER THE CABINET. I STARTED TO PULL FORWARD SLOWLY WHEN I NOTICED THE BACK OF THE CABINET SEEM TO TILT SLIGHTLY DOWNWARD. I WAS CONCERNED THE WHEEL ON THE CABINET WOULD GET CAUGHT BETWEEN THE SPACE OF THE BED AND THE TAILGATE. I DECIDED TO GET OUT OF THE TRUCK AND RAISE THE BUCKET A FEW MORE INCHES HIGHER. THE ENGINE WAS RUNNING AND I PUT THE TRUCK IN PARK ( THE PARK DASH LIGHT CAME ON) AND I GOT OUT. I WALKED TOWARD THE LOADER CAB. WHEN I WAS HALFWAY THERE, THE PICKUP TRUCK ROLLED BACKWARD, HITTING THE CABINET WHICH WAS SUSPENDED FROM THE LOADER STOPPING THE TRUCK. THAT CAUSED THE CABINET TO STRIKE THE BACK OF THE TRUCK BED, PUSHING IT INTO THE CAB, BREAKING THE BACK WINDOW AND DENTING THE CAB ROOF. THERE WAS OVER $9000.00 DAMAGE TO THE TRUCK. I HAD A $2000.00 INSURANCE DEDUCTIBLE. I HAVE FOUND THAT WHEN I MOVE THE GEAR SHIFT LEVER BETWEEN THE " REVERSE " AND " PARK" DETENTS, THERE IS A FLAT SPOT WHERE THE SHIFT LEVER CAN STAY AND A LIGHT WILL INDICATE EITHER "R"