VEHICLE WAS STRUCK BY ANOTHER VEHICLE (A PASSENGER CAR) IN THE LEFT REAR QUARTER (AT THE REAR TIRE). VEHICLE WAS BEING ACCELERATED AT THE TIME TO ATTEMPT TO AVOID PENDING COLLSION. UPON IMPACT ACCELERATOR STUCK; SUV ACCELERATED ACROSS TWO LANES OIF TRAFFIC & PLOWED INTO A DIRT EMBANKMENT. COLLISION WITH EMBANKMENT WAS HEAD ON. THIS SECONDARY COLLISION IS CAUSE OF DAMAGE TO SUV LEADING TO IT BEING TOTALED BY THE INSURANCE COMPANY. SUV DID NOT RESPOND TO BRAKES DURING SHORT ACCELERATION PERIOD BETWEEN INTIAL IMPACT (FROM OTHER VEHICLE) AND FINAL IMPACT WITH THE EMBANKMENT.