This is a popular Japanese story, it is about a poem called "Tomino's Hell." They say that you should only read with your mind, and never out loud. If you were to read it out loud, then you must take responsibility for your actions. "Tomino's Hell" (トミノの地獄) is written by Yomota Inuhiko (四方田 犬彦) in a book called "The Heart is Like a Rolling Stone" (心は転がる石のように), And was included in Saizo Yaso's (西條 八十) 27th collection of poems in 1919. It's not sure how this rumor started, but there's only a warning that, "If you read this poem out loud, tragic things (凶事) will happen." It just looks like a curse. It asks to not compare this with the common "You'll grow taller" or even "My parents died." Do you get a sense of how dangerous this is?