Do you have a crippling fear of getting stuck in a car that's, say, sinking or on fire? It sure would be a terrible situation, but it's rare enough that I don't think you should develop a complex about it. Alternately, you could go ahead and develop that complex but just carry around the Houdini Automotive Escape Tool with you at all times.

The Houdini features a safety whistle, LED light, spring loaded glass punch and a seatbelt cutter, and is compact enough to fit on a keyring. Not enough? The pro version is even more useful, and it's designed for rescue workers, firefighters, and the obsessively paranoid. If that isn't enough, maybe you should just stop driving.

Houdini Tool, via Uberreview