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 few years back, i was about 16 and my cousins were in town for the week. we decided to go fishing off some old abandoned railroad tracks and asked my 13 year old sister if she wanted to tag along. now being a teenager in the age of computers, she said she'd rather stay home and browse the internet, and that pissed me off because how often do we get to see our cousins that came from the other side of the country? well fastfoward a few hours, we were walking back to my house because i had to poop bad. i was talking to my older cousin and he convinved me that i should teach her a lesson so i decided to scare her, here's what my plan was: our computer sat right in front of a window, i would sneak behind the house and slap my hands on the glass and freak her out. here's where i messed up. i snuck up to the window waited until i saw my cousin walk through the front door then i slapped the glass as hard as i could.  crashhhhhhhhhh, it shattered all over me and a piece of glass got stuck a half inch from my eye, and i shit myself reddit, the glass shattering literally scared the shit out of me. i pulled the glass out of my face and was squirting blood like a fountain. now i had blood all over me, poop in my underwear, and had to go to the er. needless to say though, i succeeded my mission and scared the living hell out of her.

Tifu by scaring my sister