Intro to Western Art Music, David Lawrence Hall, Pitt Campus.
A Guest Lecturer is speaking to an auditorium class so the music department can decide whether to hire her:

Guest Lecturer: How many of you have your textbooks?
[No one raises their hand.]
Guest Lecturer: [angry] You guys don’t bring your textbooks to class?! You ruined my whole lecture! At this point I was going to have you read through a poem in your books, but that’s not gonna happen.!

— Overheard by Sophie