Psychotropic drug BZ tested on American soldiers. 1963.

This public domain film was obtained by a freedom of information request from the Department of Defence, and converted to digital; it may be freely disseminated. The objective here was “military incapacitation“, which is not quite the same as knocking someone out. The ideal incapacitant will not cause any lasting adverse health effects from exposure. The dreamboat/medical officer seen in this film is Dr. James Ketchum. I loved his memoir on chemical warfare, see here: (Chemical Warfare Secrets Almost Forgotten: A Personal Story of Medical Testing of Army Volunteers). I don’t know if it’s still available, but if you want I can send you a PDF of the book. This film captures what happened when four test subjects were given different doses of the incapacitating chemical 3-Quinuclidinyl benzilate (BZ) in order to test their ability to adequately perform military tasks. 1960s cell phone at 01:40