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: the other day, i was in my chinese class (graduating high school this year.) every day i sit between my best friend (let's call him louis) and another friend of mine (let's call him al.) our chinese teacher says something in chinese (i wasn't listening) and then randomly pulls up a chinese song on youtube, with a photo of a chinese lady to accompany the music. the lady was about mid 40's and was pretty average looking, but very clearly was missing a tooth. i thought it was kinda funny.

anyways, louis, in a kinda loud and comedic voice, says "wow! she's a real knockout!" to which i reply with "knockout? yeah, somebody clearly knocked her tooth out!" i look at louis, expecting a hearty laugh, but he just stared back at me with wide eyes and an awkward glare. i ask him, "what's the face for? i thought it was funny!"

louis then quietly explains to me that our chinese teacher pulled up this video because it was al's mom singing, and that was her in the photo.

me and al don't talk much anymore.

TIFU In Chinese class