PE00 020; CONSUMERT WAS TRAVELING ABOUT 75MPH ON HIGHWAY AND FELT HEAVY VIBRATION INSIDE OF VEHICLE . HE WENT TO PULL OVER ONTO THE SHOULDERS. AND VEHICLE TOOK A 270 DEGREE SPINN OUT. THEN, VEHICLE HIT A ROAD SIGN, AND IT FLIPPED INTO A DITCH. THERE WERE MINOR SKRATCHES. *AK