All the laws of physics seem to have been defied. When a 12,000-pound monster truck launches 30 feet into the air, lands hard on concrete, and instantly spins into a savage 360-degree donut. The onlookers may think it's pure chaos and horsepower. But behind the flying dirt and crushed cars lies a world of extreme, high-precision engineering. Do not mistake modern monster trucks as upgraded pickup trucks. There is nothing in common with street-legal vehicles and monster trucks