Hand-in-the-face Customer

Seriously,

        Ok, so today a customer yelled at my co-worker because we closed at our normal time and she didn't get a product she wanted. This was an honest- to- goodness 'seriously?!' moment. Sometimes I wonder what goes through peoples heads. Like, do you leave your house for a the grocery store when you know it's closing in 5 minutes? No! Logic would tell you that you should have either gone earlier or wait and go tomorrow. People are so stupid with their brains, or lack thereof. On top of that, if you arent sure what time the store closes but you decide to chance it, what makes you think that you have the right to be completely disrespectful to the a person who has no control over what time the store closes. On top of that, she threw her hand in my co-workers face as if to say 'stop making your excuses'. Ok, for the record, if someone ever did that to me, that person would not only be handless but also would all have an earful of reasons why you never do that to a working class person, or anyone! I wondering if people realize how they come across, or maybe they don't care how they come across. It's just like, do you like being classified as a jerk? And if so, why? What are you getting from that? A handful of people who are scared of you, maybe? Being in the customer service industy, you do get alot of mouthy, inconsiderate, rude and obnoxious people. All I have to say to this is, SERIOUSLY?!?!?