Didn't happen to me but to the other class at my university.
As you all know all universities changed to studies online this semester. So a teacher asked students to try solving an exercise and he forgot to stop sharing his screen. Few moment later, porn started playing 😂
Turned out he told the administration later that it was his son who did this (not sure if that's true) and he stopped working after that anyway.
I memed the hell out of that incident lol