This is a matter of business. If they mistakenly didn't charge you, they have a right to come running across the parking lot. What if they didn't? You drive off, and they sure will never get paid for the food.

A lot of people speak of being embarrassed in a consumer situation, whether it is someone being asked for identification, or a situation such as this. You know you did nothing wrong, so there is no reason to be embarrassed. Besides, exactly how many people witnessed this "incident"?

As far as engangering people's lives, exactly whose life was endangered here? The "boys" and "girls" who work at McDonald's? Do you not think that these young ladies and young men are old enough to know how to cross traffic?

You seem to be mostly indignant that they came after you for payment of your bill. Just because you thought it was already paid for doesn't give you that right. Now you should be embarrassed, but hey, we don't know you.