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 obviously didn't happen today but a few years ago when i was in my first year of university.

anyhow with in the first few weeks of uni my friends and i discovered that the elevators in the library can be opened by hand while they were moving, the elevator would come to really quick standstill and shudder like crazy for a few seconds before starting to move again. so what we used to do is get a few of our unsuspecting friends and take them on an elevator ride and scare the living shit out of them.

 so this happened for a weeks and soon got bored of doing it at the same place and the fact there would be a higher chance of us getting caught and kicked out of uni.

thus one afternoon after a 6 hour chemistry lab, i need something fun to do to get my blood pumping. so stupid me had the bright idea to see if the elevator in the chemistry building would be the same as the library. and boy was i wrong... me and two of my mates were stuck in a glass elevator between 3rd and 4th floor for 3 hours whilst people were taking picture of us. when we eventually got out the the elevator technician had the biggest grin on his face,because he knew exactly what we did even though we denied it, so we thanked him and bolted.

since that day i have never touched an elevator door

TIFU by opening an elevator door