Dramatic dialogue recounted by a man who teaches in a small town in the country (T = teacher, S = student):
T. What’s 60 divided by 15?
T. What’s 15 divided by 60?
S. We can’t do that, moron!
T. You’re twenty years old, still in high school, taking a course designed for 13-year-olds, and failing it, and I’m the moron?
I assume the last line is what he would have liked to say in retrospect, or what he did say under his breath, rather than something he actually said out loud to the student’s face.