Talk about a dream job. A handful of lucky engineers just outside Paris earn their euros creating wild concept cars for Peugeot, and their only imperative is to advance the state of automotive design. While dreaming up their latest project, they hit upon a radical way to skim weight: ditch the vehicle's rear end. Specifically, they eliminated one of the wheels and all the accompanying components, including suspension, brakes, and the actual body around it. The result, dubbed the 20Cup ("two-oh cup"), is a 1,279-pound three-wheeler that carries just 20 percent of its weight in the rear.