Movement disorders are rarely medical emergencies or reason for evaluation in the emergency department (ED). However, they may be seen, and range from the familiar parkinsonism and drug-induced dystonia to rare disabling hemiballism secondary to a stroke. Movement disorders are typically a sign of an underlying neurological or nonneurological disorder, rather than the primary diagnosis. They can be strange in appearance and are often misdiagnosed as being hysterical or psychiatric in origin. In the ED, movement disorders are diagnosed based on a history and physical examination, with relatively few contributions from laboratory and radiographic studies.