Lexus GS Acceleration problems by year

Car parked in driveway; started engine, shifted into gear, and before I even accelerated, the engine roared and the car lunged forward. Lexus traveled approximmately 50 feet and crashed into the neighbor's concrete wall across the street. I was injured (broken ribs, etc.) and the car was totaled.When reporting accident to insurance company (USAA) I asked representative to have car inspected due to accident circumstances. I do not know if they did an inspection as I was in hospital and at home recuperating. NO prior issue of this type.

On July 29th at approximately 8:30pm, I got into my car after exiting the Meijer store and noticed the car making strange noises and was hard to get in gear. I park so I don't have to back up, so I put the car in drive and it went fast in reverse, when it went forward, it went crazy and I ran into a tree island and busted 2 tires and finally stopped. Fortunately this happened in a mostly vacant parking lot. This car has a lot of horsepower and those horses went crazy. I answered a question on how fast I was going? I answered 50mph, I went from 0 to 50 in a parking lot with my foot on the brake!

The contact owns a 1999 Lexus GS400. The contact stated while driving at 1 mph, the vehicle accelerated independently. The brakes failed to engage while depressed on the brake pedal almost causing a collision. The contact informed the independent mechanic of the failure, but the vehicle was not diagnosed nor repaired. The manufacturer was not made aware of the failure. The failure mileage was 67,000.