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 only reason i'm telling you this is because my gym teacher wanted a paragraph about what i did wrong so here i go.

before gym class started we were waiting for the teacher and such. i go to a high school and freshman boys are not exactly the most mature. so my one friend i'll name him jerky, jerky had a water bottle that did a good job shooting a shot at water after shaking it. to emulate the act of masturbation in a comedic way i slid my hand back and forth for a bit and then shot the water at my friends face.

my fu costed me a detention, my pride, the respect of my peers and a good gym mark.

TIFU by pretending to masturbate in gym class