I've been hypnotized, something certainly happened. And that was just in a large group, I'm sure individual hypnotism would be more powerful. Hypnotism is recognized by the APA.
Hypnosis is a set of techniques designed to enhance concentration, minimize one's usual distractions, and heighten responsiveness to suggestions to alter one's thoughts, feelings, behavior, or physiological state. Hypnosis is not a type of psychotherapy. It also is not a treatment in and of itself; rather, it is a procedure than can be used to facilitate other types of therapies and treatments. People differ in the degree to which they respond to hypnosis. The key to becoming hypnotized is the extent to which a person is hypnotizable, which is a very reliable and stable individual difference trait that indexes one's openness to hypnotic suggestions.
Research shows that hypnosis works as part of a treatment program for a number of psychological and medical conditions, with pain relief being one of the most researched areas, as shown in a 2000 study by psychologists Steven Lynn, PhD, Irving Kirsch, PhD, Arreed Barabasz, PhD, Etzel Cardeña, PhD, and David Patterson, PhD. Among the benefits associated with hypnosis is the ability to alter the psychological components of the experience of pain that may then have an effect on even severe pain.
In a July 2001 article for Scientific American titled "The Truth and the Hype of Hypnosis", Michael Nash wrote:
...using hypnosis, scientists have temporarily created hallucinations, compulsions, certain types of memory loss, false memories, and delusions in the laboratory so that these phenomena can be studied in a controlled environment.