Hypnosis is a spooky phenomenon. Through mechanisms that are not fully understood, this technique allows seemingly impenetrable barriers to be bypassed: repressed material can be recovered or manufactured; moments of imprint vulnerability can be relived and rewritten; psychological and physical symptoms can be alleviated or created; even involuntary physiological processes can be dramatically modified. In this article, we will explore hypnosis from a psychodynamic perspective in order to gain insight into the phenomenon’s effects on defensive functioning, and vice-versa.