We had one teacher who, whenever she walked into the classroom, would announce that everyone needed to close their top buttons because otherwise, the shechina would not be shoreh in our classrooms.
Most days, I wouldn’t bother; I would fiddle around my neck a bit like everyone else, but never actually button the button.
One day, she noticed.
“Why didn’t you close the button?” she asked.
“My shirt is too small, if I button the top button I can’t breath.”
“Oy, that’s terrible. Should I call Hatzola?”
Her snark still makes me laugh. And my level of respect for her went up quite a bit after that day.