I was in the car-park of our local shopping mall yesterday watching a family carefully transferring the contents of their full trolley into the boot of their car. The car park was full, and there was a car waiting for their parking spot.
Traffic was queued up behind the waiting car and while everyone was very patient and understanding at first, you could see people becoming a little agitated as the minutes ticked by. The family could not have been unaware of the waiting car and the queue behind it.
After what seemed like about five minutes, the family closed the boot of their car and, as they walked back into the shops, kindly indicated to the waiting driver that they were not leaving just yet.