So my boss is also the professor of one of the required grad school courses. There is a all-day training that's happening next week, and it happens to be on the one day that this class meets. Boss wanted me and one of my lab mates to attend the training because it's relevant to one of my projects. So we've registered for the training, and she obviously knows that we're missing class and why, but she needs us to send her an e-mail as an official "we'll be absent"-type thing.
Because of the circumstances, our e-mail to her was basically "Hello Professor, I'm going to miss class next week for X reason, please let me know if there is any work to make up." Which was all good and fine, until she sent a scolding e-mail back that basically chewed us out for announcing that we were going to miss class and not asking permission first. So, I guess in the future we will need to ask her permission as a professor to do the things she tells us to do as our boss? That's was I got out of today, anyway. 🙄
In person it might have felt more like a good-natured joke, but over e-mail it very much did not.