Medical authorities warn that reading Harry Potter can cause head pain. Three children have been diagnosed with "Hogwarts Headaches". Doctors are silent on whether they are caused by the size of the latest book, the suspense, or the Latin. But they do agree on the remedy - plenty of television.
WARNING: the Washington Post article has some extremely laboured prose to link the story back to the books. Spookiest thing I've seen so far this Halloween.
... her daughter's headache was in all likelihood brought on by the size of the book, and suggested [she] take 20-minute breaks periodically to keep the headaches at bay, just as exclaiming "expecto patronum" protects Potter and his friends against the evil Dementors.Gah!