Under light narcosis produced by ultra-short-acting barbiturates, patients re-experience emotions associated with psychic trauma and become more amenable to suggestion. The four examples are: 1) the effect of simple suggestion in choreic movements; 2) the effect of reassurance and suggestion in hysteria with hemiporesis; 3) the production of emotional responsiveness in a schizophrenic-like state; and 4) a severe case of major hysteria in an 11-year-old girl.