At the Parking Lot

Yesterday, you were at the parking lot in the middle of the night. Now, you're back! It's ten o'clock in the morning and the mall's parking lot is already packed.

You begin your long, arduous search for a parking space, and after ten minutes it is over. You find one beside a cute Bug (Volkswagen Beetle).

You open the glove box and reach for your iPod. Then you fix yourself up a bit and kill the engine. You open the door, and then [THUD].

Uh-oh. You hit the Bug!Immediately you recognize a nasty scratch. You look around. The parking lot's deserted!

So, do you leave a note with your name and number [or something like that] or do you sprint and hope you leave the mall before the Beetle's owner does?