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: i go to the gym every morning at about 5am and normally i am the only one there. (it's a small local gym) anyways a guy walks in... skinny little fella, but you can tell he had the motivation to make all kinds of gains. anyways i go to grab a dumbbell and he's in front of me and i say "what's up" as a casual hi... well he thought i said "watch out". he said sorry and i was thinking why did he say sorry the whole time i was working out... about 5 minutes in he gets frustrated and walks out of the gym... at the door he yells "all you gym rats are the fucking same". i felt horrible because he seemed like a very nice person... :(

TIFU by saying "What's Up?" at the gym.