Definition: In this task, you are given a Reddit post as a text. Your task is to generate a title for this text. The title should start with "TIFU by", followed by a situation that caused humor. The title should contain 7-12 words, ideally.
Input: Text: okay so, today we had a senior field trip. after leaving homeroom, we are called to the auditorium to be told which bus to board. my class is among the first to arrive, and i pick an aisle seat in the front. all the other classes walk through the aisle to fill in the sights. unfortunately, the aisle is rather narrow. people occasionally bump into me, sometimes a little hard, without apologizing. i get a little agitated, naturally. someone hits my head again, but this time they brush it repeatedly. i recognize the color of the sleeve they were wearing, and i think it belongs to my friend. jokingly, i yell out "touch my head one more time, and i'll kill your family!" usually, my friends laugh at this kind of thing, but i don't hear any laughter. the kid next to me is sitting with their mouth open, apparently in shock. confused, i turn towards the person i yelled at. it's not my friend. the school administrator stared at me, her mouth agape, astonished at what i just said. now everyone is calling me "the serial killer".

TIFU By threatening to kill my school administrator's family.