Vivien is a 16-year-old girl diagnosed with a rare type of autism spectrum disorder. Her behaviour is extremely aggressive – besides hitting her own face she kicks or punches anybody (including her parents) who tries to approach her. Vivien’s aggressive, self-injurious behaviour began at the age of 4–5 by hitting her head against the furniture and wall. Before, her parents were not aware of her daughter being different from other children. Her condition gradually worsened. The only way her teachers manage to control her self-injurious behaviour is pulling Vivien’s finger backwards. After school, Vivien spends the rest of the day at home, bound to a chair. At night, she can only sleep after taking drugs.