The document discusses the tort of intentional infliction of psychiatric harm. It provides details on a case where a defendant played a practical joke, telling a claimant her husband was injured, which caused her serious psychiatric harm. The defendant was not liable for trespass since there was no direct interference. The document outlines the requirements for this tort: the defendant's behavior must involve threats or false statements; the harm must be physical or recognized illness, not just distress; and the defendant must have intended to cause harm or been reckless about possible harm. An example is provided where threatening to call someone a spy caused nervous illness.