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: my girlfriend and i were in bed talking. i told her i could do a push-up with her laying on my back. she didn't believe me so, me being the cocky son of a bitch that i am, attempted to do it. i couldn't do it, shockingly, and now i have the worst back pain imaginable. it hurts to poop.

TIFU by showing off to my girlfriend in bed