1. Two cases of acute catatonic excitement with unusual complications are presented.2. The first case survived a stormy course of peripheral vascular collapse, acidosis, and hyperthermia to 106°. Recovery was complicated by the development of lower nephron nephrosis.3. The second case died in the course of voluntary apnea. This is the first such case to be reported.4. It is suggested that suicide may be accomplished at a physiological level.Abstract Teaser