Off by One
The semester I took crypto, Spring '23, Justin also taught it. So for fun I would sit in his section every so often (my friend Oliver got in and I as jealous).
Towards the end of semester, attendance dropped off so one day I came and there were about a dozen students out of ~80. This might’ve also been after an exam, and people often skip the next day to recover.
Justin jokingly said those in attendance would get extra credit on the next assignment.
I then outed myself as a student from another section, and informed him he’d have to amend his count. Tragic.