it depends on if you believe everything you hear. But its an American folk tale story and I think it was in the movie "The Ring". Hope this helps

No, it is not true. It is just a superstition. There is a superstition that says, "Step on a crack, brake your mother's back". I have stepped on many cracks while walking on a sidewalk, but my mother's back has never broken. (Over 15 years ago, my mom slipped on black ice and landed on the back of her neck. She lives in pain everyday. She did not fall because of a superstition. My mom was in a hurry and she was walking fast, so she slipped and fell.)

It's an old European superstition. The origin isnt exactly known, but quite possibly because of the significance of the number 3 in Christianity (Father, Son, Holy Ghost) and thereby a ladder leaning against a wall makes a triangle, which would be bad luck to walk through.

Yes for American and British people but I walked under a ladder many times before and I am still alive and in good health. :)

It is just a supersition. It is not true