The Hummer: off-road giant with a license to stand out. For fans, it's powerful, strong and cool. For critics, it's showy, unpractical and pointless. Either way, it's still extraordinary. No wonder, it's designed like a tank and has the CO2 emissions of a coal-fired power plant. We visit the Hummer World Run, the world's first get-together for off road giants with 200 vehicles and over 12,000 fans from all over the world. Three off-road vehicles with eight ton live-weight show what they're made of in an extreme test: Hummer H1, H2 and H3 go off-road, pushing their limits and beyond. We also accompany the Hummer racing team on the German off-road championship. The two top drivers are a married couple. They get into a great big mud fight with their opponents, but it's rocking in the cockpit too!