Have you ever stopped to think about how GPS works? It really is kinda cool, albeit in a strange sort of way. I know this has happened to you....you're driving, you're all alone in the car with nothing but an endless stretch of road in front of you. You find yourself wondering, what if all of a sudden, your GPS started to converse with you?.......freaky. The below video brilliantly creates  that very scenario with unsuspecting passengers in a cab. I also know for a fact that you have wondered on at least one occasion, if your GPS was watching you....come on admit it...you have.