If there's one thing you can rely on at the Geneva Auto Show, it's that Swiss coach builder Rinspeed will always have something completely ridiculous on display. Last year it was the sQuba a bizarre, amphibian, modified Lotus Elise. This year it's the iChange, a concept car that adapts its body shape depending on the number of passengers onboard. This is really quite a bright idea, reflecting the reality that most cars are single-occupant vehicles for most of the time. So when there's just the driver, the iChange adopts a streamlined teardrop shape. Need more space, and the back pops up to accommodate two additional passengers. An electric motor provides the power.