No. That is a childhood nonsense rhyme.
Walking in front of a black cat, beneath a ladder, stepping on cracks and setting sail on a Friday
Breaking a mirror will bring seven years of bad luck. Finding a four-leaf clover is considered good luck. Walking under a ladder is believed to bring bad luck.
Because in the beginning of the story the first line of the first chapter is "mom doesn't know that stepping on the lines and cracks in the sidewalk is bad luck" its a thing that kids do for fun, it isn't actually bad luck
there is no such thing as bad luck
* A rabbit's foot will bring good luck * Breaking a mirror will bring seven years of bad luck * Walking under a ladder will bring bad luck * Stepping on a crack in a sidewalk will break your mother's back * Fishing for trout while sitting on a zebra backwards will cause your eyeballs to pop out.
The general consensus I think is bad luck. If a black cat crosses your path while walking under the ladder..... run.
walking under a ladder has traditionally been bad luck in the South for decades.
walking in the rain is good luck because you are washing away bad things that you have done.
Bad Luck
The Verve
because you think its bad luck to step on them.
There are no causes of bad luck because good and bad luck do not exist. But allegadly, stepping on a crack, walking under a ladder, and knocking over a salt shaker are some of the most popular 'causes' of bad luck.