About 8 years ago I was working at a theatre in high school. I wasn't a manager or anything... Just working in box office.
I had this woman who was probably in her mid thirties berating me for over five minutes about the prices for tickets and food.
After letting this go on for far too long I interrupted her and said:
"Look last, I'm 17 years old. I wear a polyester polo and a plastic name tag... Do you really think I have any thing to do with these prices?!"
She immediately shut up and walked away without another word. My manager who heard the entire thing laughed so hard and thankfully didn't write me up.
Seriously one of my favorite moments working there... Or any other customer service job for that matter.