When brakes fail on a downhill road, in an emergency you may scrape the side of the vehicle against a mountain slope to force it to slow down and stop.

ANSWER · A

When brakes fail downhill the situation is urgent. Use any external means available, such as steel parts of the front bumper and body, to scrape or collide with rocks, trees, or earth slopes by the roadside, forcibly stopping the vehicle without threatening passenger safety.

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