Conversation on the Subway is impossible. The ingenious gentlemen
who constructed it started with the object of making it noisy. Not
ordinarily noisy, like a ton of coal falling on to a sheet of tin,
but really noisy. So they fashioned the pillars of thin steel, and
the sleepers of thin wood, and loosened all the nuts, and now a
Subway train in motion suggests a prolonged dynamite explosion
blended with the voice of some great cataract.

- from Psmith, Journalist