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 about a month ago. i work for the records office in an inactive prison. we are pretty much a warehouse for paroled prisoner files. facilities order files when the assholes violate parole and are brought back, and we send them out. there are only six people that work in my particular area, so we all have quite a bit of freedom. this place is huge, and we have files stored all over the building, a lot of them in creepy, run down spots. so, there are a lot of good spots to scare someone. we make a game of it some days. every morning, we get prisoners from the surrounding facilities to come in and clean the offices. a guy in my office is responsible for taking the files that we are shipping down to the mailroom and bringing the prisoners back up. on this particular morning, he used a dolly and had to take the elevator down. no one uses the elevator but us, so i decided to wait around the corner for a good scare when he came back up. a few minutes go by, i hear the elevator kick on... the doors open... the dolly rolling... wait... wait... i jump out, yell at the top of my lungs and am immediately thrown and pinned against the wall. holy shit, it was one of our prisoners. as i was sure i triggered some kind of involuntary response in him, i frantically tried to apologize and explain myself, literally fearing for my life. once he realized what had happened, he let me go, apologized for the physical contact, and walked off. fearing the loss of my job, i never said a thing to anyone about it. i'm just glad i walked away un-shanked.

TIFU by trying to scare a co-worker.