Which of the following must NOT be done when brakes fail while driving?

If your brakes fail, pump the brake pedal. Pumping might temporarily restore enough brake fluid pressure to slow or stop your vehicle. Downshift to a lower gear. This uses the braking power of the engine to slow your vehicle. As a last resort, rub the wheels against a curb to reduce speed. If a collision is unavoidable, steer for a sideswipe rather than colliding head-on into something solid.