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 yesterday.  i'm chaperoning some high schoolers for a convention i won't name.  i take a few of my kids to a comedy workshop.  it's very packed, so i sit in the back.  the speaker is some stand-up comedian i've never heard of, but he insists on spending the first 10 minutes talking about himself and making sure everyone subscribes to him on twitter and facebook.  okay, no big deal.  he seems like a nice guy.  he then proceeds to warn everyone that "we will be definitely not be seeing him do any stand up, and if we came for that, to leave.  he's going to teach."  fair enough.  well, another 15 minutes pass, and it becomes pretty evident that the guy is just doing stand up with a very minor undertone that ties in some sort of lesson about comedy.  and quite frankly, the guy is only mildly funny, but high schoolers will laugh at anything, so he's definitely not bombing.  it went south though, when a small handful of people started leaving.  it was mostly girls doing this.  at one point, a group of like 3 girls one after the other slammed the door next to me really hard.  the guy pauses and says "what was that?"  everyone goes really quiet.  nobody says anything because the phrase "people left" doesn't seem like an appropriate thing to say.  i realize someone needs to break the ice, because the guy has started to unravel a bit in the last 3 minutes regardless.  

so i say, "just some girls making too much noise."  before anyone can react, the guy goes "oh man...don't say that."  and instantly the tone changes from a lighthearted attempt at deflecting the situation, to him making it sound like i was being a sexist.  to be fair, it was probably a pretty stupid thing to say.  i didn't mean it at all like he decided to hear it.  

i stupidly stick around for a few minutes longer (idk why), when this kid comes in because he needs to pull two girls out for another workshop.  right before they are going to leave, the comedian stops everything and says "i just need to stop really quickly and point out how rude you three are being.  you came in here and pulled them out of the front row and disrupted my entire class.  that's insanely rude."  he actually went on and grilled them for about 30 seconds to a minute.  it was one of the most brutal things i've seen.  finally the kids leave in utter shame.  i got out of there as fast as i could, sensing that the room had significantly changed.

i talked to my kids afterwards, and they said that things got pretty bad.  he started telling canned jokes to try to get people back on his side.  some of which were apparently stolen, according to them.  idk.  weird.

TIFU by becoming an accidental sexist while trying to break the ice