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: this happened last monday. i'm 16, and i go to a really pretentious stuck-up, religious high school. they literally make us pray every morning for 15 minutes, and when i say 'make us', i mean they take rounds around the grand hall to actually check if we're praying (idk maybe god sponsors this shitty school, i don't trust him after donald trump)
i digress. so basically, it was the physics class. my teacher's an old fucktard who thinks he knows everything. he's teaching us about light. we're having an argument about the double slit experiment. he claims there's no quantum physics version of it, but i'm 100% sure there is one.
"no no. nothing is there."
- "of course there is, sir—"
"no no"
he basically just kept saying no like it was the only word he knew. see, i'm generally the quiet guy who sits in a corner and doodles, but today, oh no, i had to prove this asshole wrong. so, at this point, i just got up, went up to the board, explained the entire experiment to him. to my surprise, he didn't object. 
"—so i'm obviously not making all this up, does this make sense to you, sir?"
i was trying to be respectful, because i didn't want to get into unnecessary trouble, i just wanted to bring his ego down a notch.
so after i spent fifteen minutes explaining to this dude that not just photons, but electrons too form wave patterns if the double slit experiment were to be performed with electrons, he stared at the board for five whole seconds and said 'no.'
here's where i lost my shit. "well, then fuck my ass and call me sally. i'll keep screaming 'no' while you do it", i thought to myself. but i didn't. i said it out loud, subconsciously. i didn't even realise it, everyone was just shocked. i fucked up. i didn't know what to do, so i just added a "sir" at the end. i almost expected him to say 'no' again, but instead he lectured me for an hour about respect and took me to the principal.
gotta complete 50 hours of detention over the year because of this penguinz0-esque harmless humour.

TIFU by telling my physics teacher to fuck my ass.