2007 LEXUS ES350 User Comment / Complaint

On two prior occasions the vehicle accelerated from speeds between 20-30 mph, to speeds up to 50-60 mph. on 9/11/07, the vehicle accelerated at speeds up to 80-90 mph. we are aware of the lexus notification of floor mat interference, so we removed the mats after the first two times, but the last and most frightening, occurrence happened without the mat in the vehicle. the car had to be forced into park in order to slow it down to a halt. my wife was driving the vehicle at the time and she states she almost had several multiple car accidents while trying to stop the vehicle. i had the vehicle towed to the dealer and they said it's the floor mat, before even driving the car. we won't drive the car again until someone other than lexus determines what the problem is.