Most people are familiar with the saying that walking under a ladder is bad luck. What they might not know is that there is some truth to that old superstition. While the origins of this myth vary depending on the culture, the most accepted version is that ladders were thought to resemble gallows in medieval times. Therefore, if you walked under a ladder, you would be destined for the gallows yourself. While walking under a ladder will not magically infuse you with some sort of supernatural curse, the improper use of a ladder does pose a significant risk to your health and safety. An accidental bump of the ladder could throw whoever or whatever on it off balance.

Source: Midland Ladders