Student raises hand and interrupts professor to ask what an abbreviation means or to clarify a word that he wrote on...

Had a professor like that, except from the moment he walked in the door to the moment he left, he never once looked at the students. He could be lecturing to an empty hall for all he knows

Imagine going into a scientific field because you have a passion for it and you want to do research, but also huge social anxiety.
And then you don't manage to find any position in industry R&D or public research labs, so you have to take one as a professor, with half you time consecrated to teaching by obligation.

Whenever you have a shitty math college teacher, remember that they studied math, not education science.
And it gets worse at the grad level, lecturers are usually high-level researchers who give like 3 classes a year at most, and don't give a single shit.

>when the prof interrupts the lecture to crack jokes that fall flat

What if it is deliberately ambiguous in the way that relies on the reader's good faith assumption of the meaning when the author actually wrote it in bad faith? Member PRN in the Hillary scandal?
>Platte River Networks
>pro ne rata

A PRN employee could be an employee of Platte River Networks but a pro ne rata employee is a temp.