The contact owns a 2019 Subaru Outback. The contact stated while reversing into a parking spot and depressing the brake pedal, the engine revved and the vehicle seemed to attempt to accelerate unintendedly. The contact maintained the brake pedal depressed. The contact stated that the failure occurred while at a complete stop at the stop sign and while driving over a speed bump. There was no warning light illuminated. The dealer was contacted and informed the contact that the VIN was not included in a related recall. The vehicle was not diagnosed or repaired. The manufacturer was not notified of the failure. The failure mileage was unknown.