Speed Control Cable problems of the 2002 Lexus RX300

I experienced sudden unintended acceleration in my 2002 Lexus, Rx300 on 4 Aug, 2010. I was in a parking lot making a left turn into the parking area when the vehicle revved full throttle and surged forward. I applied the brakes fully and when the vehicle did not fully stop I put the vehicle in neutral while still applying the brakes and stopped the vehicle. It was still idling full throttle. I shut it off and let it sit a few minutes and started it again. It went to full throttle and would not throttle down. I then went under the hood and tried to jiggle the accelerator linkage but to no avail. I called the local Toyota service department and they told me to get the vehicle there. I had it towed to the service center. They would not do any work on it or even look at it because it was a Lexus and they had been instructed not to do anything with unintended acceleration problems on any type of vehicle that was not a Toyota even though Lexus is manufactured by Toyota. I had to get it to a Lexus dealer in tucson, az (~80 miles away) for diagnosis. The Lexus dealer service center diagnosed the problem as a bent throttle cable. Some how a cover had come loose and the cable was exposed from its sheath and bent. I am sure the Lexus of tucson service manager, mr. Paul minor could explain it exactly but that is my interpretation of what he explained to me. I asked him how this could have happened and he said he did not know. The repair was accomplished for ~$365. 00 parts and labor. I will have the car back on Friday 20 Aug, 2010. I will have the old/bad parts on hand. I feel this is a problem in design that Lexus should take responsibility to reimburse me and to issue a safety release and recall. There should be a fail safe if the throttle cable should bend. In my case the bent cable caused a full throttle condition and sudden unintended acceleration. I was fortunate that I was aware of what to do in that situation and that a pedestrian or another vehicle.