At Mind Hacks, an interesting summary of an unorthodox psychiatric case. The title of the paper covers it nicely: Exorcism-resistant ghost possession treated with Clopenthixol. What perhaps makes this out of the ordinary is that the “ghost” in question was seen by other people, and the authors themselves express uncertainty as to the medical nature of the problem. Although possession can be cured by a four milligram dose, apparently. Worth reading, worth following the links.