I've shared this story with other colleagues, so I hope posting it here doesn't "out" me. Here goes nothing.
Back in the dark ages of my graduate TAing career, I went to Far Away from Family School which only gave two days for a break. I had a graduate seminar on Wednesdays, and despite the rumors that Kindly Old Professor usually let classes out early that day, my family and I weren't willing to risk me missing a flight home.
The painful decision was made that since I would be home in three more weeks, it wasn't worth flying me home on Thanksgiving proper either. I was going to stay at Far Away from Family School. It was the first time in my life I would not be with my family. I was heartbroken, but I knew I had bigger responsibilities.
The professor I TAed for scheduled exams for the day before Thanksgiving. (Another reason I did not leave early, even though all the in state grad students were willing to swap Wednesday TAing for Monday with the out of state grad students for that week.) It was not a surprise; it was on the syllabus from DAY ONE. I also warned them every month to plan their travel schedules accordingly as "leaving early for the holiday" would not count as an excused absence, plane tickets or no. (Besides, an exam the Monday when you return from Thanksgiving is just as bad for the little brats as it "ruins their holiday.")
One of the more obstinate little bastards decided that an exam before Thanksgiving was the end of the world. He was sullen and surly. The week of Thanksgiving, he tried to incite an insurrection in the discussion section I was leading, sans prof. He started saying that it was "bullshit we had an exam the day before Thanksgiving." I said, "Watch your language. It has been on the syllabus since the first day of class. It is not a surprise."
I don't think he was expecting that I would (to quote my lovely Nana) shut that shit down.
Taken aback, he said, "Why do you have to ruin our Thanksgiving? Don't you have a family that loves you or something?"
It hurt like a slap across the face. I felt tears welling up. In order to do my job well and not be a snowflake, I wasn't going home. I was aware that being grown up required personal sacrifices. I didn't have a snappy comeback. It was my first year as a TA, and I had never truly encountered an entitled snowflake in my capacity as instructor before. I managed not to cry in front of my class.
Fortunately, the other students in the class rallied to my defense. I think one of them even hugged me. I don't remember everything the other students said, but it was putting the jackass in his place. I just gave the jackass a look of death and repeated that there was an exam on Wednesday and if he missed it, he should withdraw from the class because he wasn't going to get a makeup exam from me, ever.
It's been years, and that interaction still gnaws at me. I am much better prepared to deal with that level of hostility and rudeness, but it still bothers me.