In 1996, a man named Robert Dewey Hoskins hopped a security wall guarding Madonna's Hollywood home and threatened to cut the singer's throat if she refused to marry him. Hoskins was later arrested and sent to prison for 10 years. Last July, Hoskins was arrested again, and shipped off to a mental health facility in Norwalk, Calif., where he remained until recently. As of today, nobody knows where he is; according to L.A. police, Hoskins has escaped the mental hospital, and remains at large. It appears his breakaway was pretty nonchalant: In a spare moment when no one was looking, he simply walked away from the facility. Hoskins has been described as "highly psychotic and violent when not taking his medication." [via Rolling Stone]