During World War I, many soldiers who had been on the front lines became disabled by "shell shock," which often included uncontrollable twitches, trouble walking, and amnesia. At the time, shell shock was largely misunderstood, so many thought these soldiers were weak or cowardly; treatments included solitary confinement and electric-shock therapy.
One doctor thought differently and treated shell-shocked patients with hypnosis, massage, and therapy. He also took before and after footage of some of these men and, luckily for us, some of this footage has survived. Mail Online has the footage online; however, you'll have to scroll down the incredibly repetitive article to find it. The video is well worth the effort.