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: so this happened a while back. we had some kind of talk about democracy in school which finished with a trip to a local museum. we had lunch and afterwards one of the teachers in charge rounded us up and did the register. by the time i reached the teacher doing the register and for some reason marked me present. i figured it didnt matter since i was planning to go to the museum anyway so i went over to my friends to talk. after a couple of minutes i told them i was going to the bathroom and joked about being in a shitty comedy where one of the characters leaves the room and comes back to find everyone gone, and of course, thats exactly what happened.
my first thought was to go up to a teacher supervising the canteen and ask her what to do. unfortunately the teacher supervising was crabbit as fuck. she told me that i could either sit through the entire morning democracy talk with another group, or sit in the study for the rest of the day. of course i didnt settle for that. the first chance i got i sneaked out of the room and went up to reception. i asked the receptionist if she could phone for a taxi to bring me down to the museum. at first she said she couldnt do anything. it was only after what seemed like minutes of begging that she finally gave in. soon after a taxi came and took me to the museum. when i went in my friends asked me where i went. i said that the school left me behind and we laughed our asses off at how ridiculous the whole thing was.

TIFU when I got left behind in school