It was unfortunate to learn that work did not have the concept of semesters and you couldn't just write off an assignment from your boss as 'well I'll get a zero from that one, but there's always next semester'. They just keep bugging you about it over and over even though clearly I've moved on already.
Semesters were a much easier 'reset' than getting fired was.
The number of people in college that didn't know Office has built-in citation management boggled me. Or how tab stops work. Or how to use fricking styles and page templates instead of setting everything manually (that one goes for PowerPoint as well).
...then again, most of them used Google Docs. sigh