Not much can harm a cactus. And it is this fact that has been used to full advantage in the car of the same name by Citroen. It is absolutely unique because it incorporates clever air pockets on its doors. Why? Have you ever been thoroughly fed up on returning to your car in a car park to find a dent in the door? That’s not going to happen again with the Citroen Cactus because any door daring to touch the plastic air pouch will simply rebound like a bouncing ball. What a great idea. It doesn’t look half bad either.