AFTER COMING TO A FULL STOP IN TRAFFIC BEHIND ANOTHER VEHICLE, ATTEMPT NORMAL ACCELERATION TO CONTINUE IN TRAFFIC FLOW. VEHICLE SPEED THEN STALLS AT UNDER 25 MPH WITH RPMS GREATER THAN 3.5 AND ENGINE ROARING. PULLED OVER TO CURB AND PARKED. WITH VEHICLE IN PARK , REVVED ENGINE TO OVER COME STALL. WHEN TAKING VEHICLE OUT OF PARK IT JUMPED FORWARD AND REAR ENDED THE VEHICLE IN FRONT. *JB