"Professor Binns." Fork goes in pie. It makes a soft clink noise against the bottom of the plate. "Could make anything boring. Even ancient Roman mysticism. No one even remembers when he died, he's been teaching History of Magic as a ghost since before I was a bloody student."

If you're not going to take this seriously, Charles, you get to hear more about Hogwarts. Suffer.

"My peers kindly pointed out the chair they think he died in. So the story goes it took them ages to notice, because the staff room has very nicely constructed freshening charms in it. And he was teaching every day, anyway."