G-d taught Moses the laws pertaining to damages caused by a person's animals or property, including a pit that someone digs in the public domain.
If a person uncovers or digs a pit...and an ox or donkey falls into it, the one responsible for the pit must pay for the damage.
Exodus 21:33-34
The same law that applies to a pit (i.e. a sunken hazard) applies to a raised barrier or other obstacle (i.e., a protruding hazard).
Spiritually, a pit represents our ability to receive and a protrusion represents our ability to give.
Properly used, these abilities can be beneficial; without proper supervision, however, they may cause damage.
If we give and receive haphazardly--not paying heed to what or how much we are giving or receiving, or to whom we are giving or from whom we are receiving--we will become a danger to society. But if we choose to accept only positive influences and spread only positivity throughout our surroundings, we will become a source of blessing to all around us.
From Daily Wisdom