WHILE MERGING ONTO THE INTERSTATE VEHICLE ACCELERATED ONCE ON THE INTERSTATE WHEN CONSUMER TOOK FOOT OFF THE GAS PEDAL AND THE VEHICLE ACCELERATED. THE PEDAL WAS STUCK AND HAD TO TAP THE BRAKES WHICH HAD LOCKED UP. ALSO HAD TO PUT THE VEHICLE IN NEUTRAL, AND THE VEHICLE SWERVED AROUND INTO A TRACTOR TRAILER. THE VEHCLE FLIPPED 3 TIMES BEFORE IT CAME TO A STOP. *AK