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 class is on the 8th floor of a building at school. while on the ride down the elevator full of people stopped on the 2nd floor. to which i announced to all "what lazy motherfucker needs to use the elevator going down 1 floor. as the door opened a man in a wheelchair appeared. and my pride disappeared.

TIFU by inadvertently calling a man in a wheelchair a lazy mofo.