Go under a ladder. 

Probably the most well-known superstition, going under a escalator can cause panic. The explanation lies in the instinct for self-protection: the danger of falling from an object or from the ladder itself arouses alerts and makes us hesitate when going under. Also, if someone is up on the top of the stairs, they can instinctively be played by a threat. For this reason, most people prefer to go through the outer side of the stairs. Have you ever count the steps at the entrance to old buildings? The number is likely to be odd. The reason for this must be found centuries ago, in ancient Rome. The Romans stood out for being practical, but at the same time they were extremely superstitious. Among his preferences was building buildings with staircases finished in odd numbers. In this way, you started and ended with the same foot.
Stairs leading to the door. According to the ancient tradition of Feng-Shui, if the main staircase of the house faces the front door, it generates a negative flow of energy. The result? According to Feng-Shui it is synonymous with a family that loses money.

Open an umbrella in an enclosed space

For several centuries, opening an umbrella indoors has been directly linked to a coming misfortune. Many of these superstitious people claim the evil power of this act, but the vast majority do not know how to explain the true origin of this belief, attributing it to ancient enchantments and ancient curses that mix Gods, beliefs and death. Many people, before leaving His house opened the umbrella and thus they accessed the street without having to get wet and they even did it in reverse, accessing the house with it still open.

This caused many household accidents, taking out more than one eye and causing multiple injuries, quickly leading to the belief that opening an umbrella indoors brings bad luck.