Have Some Soup.

"There were a hundred and forty-two staircases at Hogwarts: wide, sweeping ones; narrow, rickety ones; some that led somewhere different on Friday; some with a vanishing step halfway up that you had to remember to jump. Then there were doors that wouldn’t open unless you asked politely, or tickled them exactly in the right place, and doors that weren’t really doors at all, but solid walls just pretending."