I WAS DRIVING IN HEAVY TRAFFIC (STOP AND GO); I WAS FULLY STOPPED WITH MY FOOT ON THE BRAKE - I EASED OFF THE BRAKE TO SLOWLY ROLL FORWARD - ABSOLUTELY DID NOT PLACE MY FOOT ON OR ANYWHERE NEAR THE GAS PEDAL - AS I EASED OFF BRAKE, I FELT A STRONG "SURGE" FROM THE FRONT OF THE CAR- THE CAR ACCELERATED AND I SLAMMED IN TO A TRUCK THAT WAS DIRECTLY IN FRONT OF ME- I LOOKED AT THE DASHBOARD AS THIS WAS HAPPENING AND THE "CHECK ENGINE" LIGHT AND THE "TRACTION" LIGHT WERE BOTH ON - I TRIED TO BRAKE BUT THE BRAKE PEDAL WAS HARD - I WAS STOPPED DUE TO THE IMPACT OF HITTING THE TRUCK-- I AM ATTACHING THE EDR REPORT AS RETRIEVED BY A COMPANY LEXUS CONTRACTS WITH