When Mercedes Benz showcased a concept car a few years ago bulging to the headliner with no less than 18 inflated airbags, small wonder that some people have a perception that an injury-proof car exists. While it's a fallacy to believe we can escape injury following a serious car crash, passive safety devices to protect all parts of the body have come a long way in short period. Once the sole preserve of luxury cars, airbag modules are now concealed in the even smallest cars.