Intertitles explain the nystagmus in reaction to the ears being chilled. The eye movements are shown. The horizontal ear canals are tested, and the duration of nystagmus is shown to be variable. The effects of hot water are tested. A rotation test is performed, with the patient's eyes following a pen held by the doctor. The intertitles explain the effect of rotation on the ear canals, and the resulting nystagmus. The eye movements are shown. A falling test is performed. The patient is shown trying to walk after being spun around.