A more thorough explanation:

Definition: Private necessity is a defense used in tort law when a person interferes with someone else's property in an emergency to protect their own interests. It is not an absolute defense, and the person who committed the trespass must still pay for any harm done to the property. However, they are not liable for nominal or punitive damages. As long as the emergency continues, the person is allowed to remain on the property and cannot be ejected.

Imagine a person is driving on a deserted road and their car breaks down. They see a nearby house and decide to enter the property to use the phone to call for help. This is an example of private necessity because the person had no other options and needed to protect their own interests.

Another example could be a person breaking into a neighbor's house to escape a natural disaster, such as a flood or fire. In this case, the person is protecting their own interests and is not liable for damages caused by their trespass.

These examples illustrate how private necessity can be used as a defense in emergency situations where a person needs to protect their own interests. However, it is important to note that the defense is not absolute and the person must still pay for any harm done to the property.