In the event of brake failure, shifting to a lower gear and gradually applying the handbrake (or parking brake) can help slow the vehicle down safely. This utilizes engine braking to reduce speed and allows the driver to regain control over the vehicle. Continuing to pump the brakes may help in rare cases, but focusing on lower gear usage provides a consistent method to manage speed without primary brakes. This approach ensures that you maintain control during brake emergencies and can stop safely.