Yeah it was that time in university when my English teacher asked my classmate who was foid how come she didnt know me and my brother by names (she knew the names but not who was called which, couldnt tell us apart basically). She said something hesitantly, and I replied with clear irony in my voice "Yeah, that's indeed an unfortunate occurence", as in some oratory performance. She tried to suppress laugh, but it slipped away. I felt myself a winner in this debate.
There was another time when I was on my way from the gym class and two girls from my group catched up with me, one saying " you know, they say [teacher's name] is unwell, so our today's class is cancelled". I replied "And who's that?", like who the fuck she is talking about. She and the other girl both cracked up with laugh, and then continued " Oh man, it's our functional analysis teacher. The classes are over for today."