Friday the 13th is considered an unlucky day in Western superstition. Although there is no scientific evidence to support the superstitions surrounding this day, some people still believe in them. Here are some things that people avoid doing on Friday the 13th:

• Walking under a ladder: This is believed to bring bad luck.
• Breaking a mirror: This is said to bring seven years of bad luck.
• Eating foods just the right size to choke on: This includes jawbreakers and other small foods that could get stuck in your throat.
• Using a vending machine: Two people die each year from vending machines falling on them.
• Opening an umbrella inside: This is believed to bring bad luck not only to you but to the entire building.
• Spilling salt: If you spill salt, throw some over your left shoulder or live a cursed life.
• Walking alone in a dark alley: This is never a good idea anyway.
• Letting an owl look at you: Myths say that owls looking at you through a window are extremely bad news.
• Crossing your eyes: This is believed to cause them to get stuck that way.
• Cutting hair and nails: This is believed to bring bad luck.
• Going to a bad part of town: This is something you should try to avoid anyway.
• Stepping on a crack: This is believed to break your mothers back.
• Walking past a black cat: This is believed to bring bad luck.

Its important to remember that these superstitions are not based on any scientific evidence and are simply beliefs held by some people.