People travel towing boats, mobile homes, motocross trailers; but unlike a semi, there's no backup system to stop in an emergency. The Smash Lab crew has an idea; can retro firing rockets bring a safe, controlled stop? Watch firing rockets...See morePeople travel towing boats, mobile homes, motocross trailers; but unlike a semi, there's no backup system to stop in an emergency. The Smash Lab crew has an idea; can retro firing rockets bring a safe, controlled stop? Watch firing rockets ignite! Written by
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