me: "That would be a handy power to have."
FormerUnitHead: "For that you'd need an invisibility cloak."
me: [look of recognition]
FormerUnitHead: "There are a lot of images from Harry Potter that work so well in the real world. [anecdote about his law firm wife getting this awful memo from someone and one of her partners saying "Oh, you got a Howler from So-and-So."]"