While driving my 2023 Ford F-150 XLT through a parking lot at low speed, I attempted to stop and shift into reverse to avoid a tight turn between parked vehicles. With my foot firmly on the brake, I shifted into reverseâthough the gear shift was abnormally resistant. The system indicated the vehicle was in reverse. Despite keeping my foot on the brake, the truck suddenly and forcefully accelerated on its own, overriding my braking input. It collided with two parked vehicles before I was able to bring it to a stop by turning off the engine. The vehicle continued to accelerate even while I applied firm pressure to the brake pedal, which depressed all the way to the floor and failed to stop the truck. At no point did I press the gas pedal. After impact, the gear shift remained in reverse with a blinking red light. No airbags deployed. This was an extremely dangerous situation that could have seriously injured someone had they been standing nearby. Additionally, for some time leading up to the incident, I noticed increasing difficulty shifting gears even with the brake fully depressed. At times when in park the light for other gear modes would turn on.  Indicating the vehicle may be in another mode other than park.  The brake pedal has also felt inconsistent, often requiring unusually deep and forceful pressure to stop, whether on highways, city streets, or in parking lots. This appears to be a critical failure of both the braking and transmission systems. I am extremely