Teachers: have you ever needed to have a "get it out of your system" moment

So recently I have been seeing videos of teachers complaining about the 67 meme and one caught my eye. There was one teacher who shared a story that whenever she did something that involved the numbers six and seven (like page numbers or math problems). She would let the class all shout it out to "get it out of their system" and ask to not say it again.

Now through my school years, a few of my teachers did stuff similar to this. For example: one of my English teachers in elementary once gave us all highlighters and said that because he didn't want to hear a bunch of clicking. Would let us fidget with the clamp of the highlighter as he was setting up and stop when the class started.

Another one that was kinda silly was a music teacher showed us a Nigel Stanford MV and warned us that in the BTS footage that we would be hearing the word "Vodka" and to not laugh during the video (specifically if we were to, do it now) surprisingly, nobody laughed. (Maybe a previous class did but we didn't)

Next one was slightly different. One time when I was in the 2nd or 3rd grade, the teacher brought in an advertising student to teach us the art of ads and showed us a few ads to get started. One of which being the infamous Cadbury Dairy Milk Eyebrow ad. After playing the ad she asked us if we wanted to watch it again because other classes she did kept asking for it and she wanted to satisfy us so we wouldnt keep asking as well. The problem was. Even after this, it kinda backfired as she kept coming each day for the rest of the week (it was a workshop of some sort) and each time someone would ask her about the eyebrow ad. (She always denied after the first time)

What about you, did you ever have to ask students (or even witnessed as a student) to get something annoying out of their system?