I had this unironically happen in a statistics class.

I visited said professor during office hours, and he goes: “How do you think you did?”

I said: “Statistically speaking given a standard distribution, the probability of me scoring any higher or lower than the mean is unlikely, so I guess give me a C for the course”

He stops and looks and then looks back at the computer: “Because you understand that, I’m giving you an A.”