The contact owns a 2021 Toyota Sequoia. The contact stated that while parked and the driver door was opened, he observed a beeping noise and the vehicle began reversing inadvertently. The contact dove into the driver's seat and attempted to move the gear shift but it was already in park (P). The contact was not sure if the brake was depressed at that time. The vehicle continued to reverse and collided with a creek bed. The contact sustained left hip and left knee injuries along with other cuts and scrapes. Medical attention was needed. A police report was filed. The vehicle was towed to a tow lot and then to a body shop the next day. The vehicle was towed to the dealer where the failure could not be replicated. The manufacturer was notified of the failure. The failure mileage was approximately 33,236.