I'm a corporate trainer, so hopefully this counts.
I used to train content for an exam that everyone in our field must take to get licensed. If you didn't pass, you had to go back through the course. Well, I had a dude go through my class 4 times. FOUR.
Here's the conversation we had before his 3rd exam.
Guy: "What attempt am I on?"
Me: "Wait... what?"
Guy: "Well, I've taken the test twice, but everyone else in here hasn't taken it, so am I taking my test for the first time or the third time?"
Me: "What do you think?"
Guy: "I don't know. That's why I'm asking you."
Dude thought that he might be on his first attempt because he was back in a class with a bunch of people who were on theirs.
As you might expect, he failed. He never got that license.