After driving up and down several lanes, I finally found a parking spot at the shopping mall. I noticed another man driving very slowly in the same direction, and, since he was closer, I gave him the "Are you going to park there?" look.
His responding gestures were very complicated. First he shook his head. Next he pointed at me, then at the parking space and then at himself, his watch and the mall. Finishing off, he frowned, raised his palms upward and shrugged. Once I parked, I walked over to the driver to make sure he didn't want the space.
"You must be single," he replied. "If you were married, you would've known that was the universal sign for 'Go ahead and take the spot. I'm waiting for my wife.'"