As a full time student, when Professors give you a study guide that is the OPPOSITE of the exam.
Working at the craft store job I had over the summer, this scenario
"Price check to register xxx"
I show up
Woman holds up a small bottle of paint "It said this was on sale, but it's ringing up full price!"
Me: Well let's go investigate!
Walk over to display where TWO out of FORTY tags are red sale tags. "Ma'am, this color is not by a colored sale tag. If the item is not marked as being at a reduced price, it is full retail price. The two sale tags say white and cream, and this paint is black."
Woman: Fuck you that's misleading your company has no morals I'm taking my business elsewhere you are a horible person RAAAAWWRRRRRR!!!!
And then having to do it all again the next day.
There were a lot of really nice, rewarding moments, though, so it was an overall positive work experience.