When I worked in the ER at a Children's hospital, we had a Spanish speaking family bring in their daughter (about 14 y.o.) because she was having some type of seizure activity (no hx of seizure up to that point).
We screened her and sent them to a room. After getting a pt. advocate in there (aka, Interpreter) to figure exactly what was going on, we learned that the parents believed their daughter was possessed by a demon. She was examined by an ER doc, given a blood workup, etc., and found to be healthy.
What did we end up doing? I kid you not - we held her (at the parent's request) until their priest arrived...in order to perform an EXORCISM!
She was released later that night, appearing normal, talkative and happy. I wish I could remember what the discharge instructions said.