In several movies, I keep noticing a trope: whenever someone is in a car at night, with a running engine, and headlights are on, they will keep the lights on, not only after the stop the engine, but also when they leave the vehicle.
I know modern cars are designed to preserve battery life, by automatically switching off lights after a while, but these movies I am talking about are pre-modern cars era. 2000s and before.
From where I come from, almost no one would ever leave the car off while headlights are still on. So I wonder if it is a common practice in USA? or is it just a movie thing?