<human>: Condense the text into a few key points

So, this happened about 2 days ago. I'm a supervisor at a very popular Canadian chain, and we happen to have a drive through.  It was around 10:30 at night, and myself and my coworker were pretty relaxed. We get the car "ding", that alerts us when there a car waiting to order. 

Almost immediately after, we hear an ear piercing shriek from an upset child. Our headsets are very sensitive, and can pick up whispers some times, so you can imagine how fucking loud this raptor child was. I was peeved, but I thought "It's late, kid is probably having a rough time."

But then momzilla decided to order, screaming almost louder than her kid, at the order box about what she absolutely had to have (no pleases or thank you), yelling to her kids about what they wanted. And of course, they scream their order. 

I told her, "We can hear the person in the passengers seat order just fine, so no need to worry about that.", in an attempted to convey to her that we can hear her herd just fine. No such luck, because then promptly screamed at the box her next order.

My ears were ringing at this point, so I just wanted them to move up. I got their order, but as they were coming to the window, I decided to have a bit of revenge. 

The moment they got to the window, I put on my best fake smile and gave them the most obnoxious and superficial service I could, asking in my most Umbridge-like voice how their night is, how's the family, and if I can give them anything else. I refused to give up conversation, although I could tell the mother didn't want to maintain it.

It only lasted around 2 minutes, and when they got their food, they drove off in silence. When my co-worker asked why I was so nice to them, I responded, 

"There's nothing more annoying than an over enthusiastic worker at 10:30pm."
<bot>: Momzilla and pack of Rapters scream at a tired employee that can be as sweet as a pile of stepped on lollipops.