I WAS DRIVING 50MPH AND WAS BEHIND A SEMI AS I STARTED TO PASS HIM I NOTICED AN ONCOMING CAR AND DECIDED THERE WASNT ENOUGH TIME TO PASS SO I STARTED TO PUSH THE BRAKE PEDAL TO SLOW DOWN AND GET BACK BEHIND THE SEMI AND THE BRAKES LOCKED UP WHICH PRODUCED AN UNCONTROLLABLE SPIN IN WHICH I DID A 180 DEGREE SPIN AND ENDED UP GOING INTO THE DITCH BACKWARDS AND TIPPED OVER ON MY SIDE NO AIRBAGS DEPLOYED EITHER.