Two exposures for when you have different things you want to capture in the pohoto with different light levels.
IE.. bright sky, dark foreground... room with lights.
You'd basically expose one frame for the light and one for everything else and then combine them.
Domani, what you said made no sense..
I suggested two exposures so you could get the texture of the wall without having the light blow it out... i think it's really distracting especially since the car is pretty dark.