I was making the two-and-a-half-hour drive home from college late one night, while I started to nod off. I stopped by the side of the road, killed the engine and pulled the emergency brake to take a nap. I woke up to the car shaking. Railroad tracks! A train was headed directly for me! I hit the accelerator and sped off just in time. Only later did I wonder, Who turned on the car engine and released the emergency brake?