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: warning : light spoiler about the last harry potter.

the subway was packed this morning, and i watched someone reading a book. the book itself was pretty big, and i noticed that it was a theatre play, which is uncommon. as it caught my eyes, i couldn't help but read some of the content to play that little game: "let's guess what is this man reading!".

but i didn't even had to read any dialogue, as the first thing i saw was the name of a character talking. and that character is supposed to be dead since the original hp books. 2 seconds later the man moves his thumbs and lets me see "the end" written at the end of that page. i just got spoiled, the hard and regretful way. let's just hope that was some kind of flashback, but i doubt it.

TIFU by reading over a stranger's shoulder in the subway