In any case there's bound to be much crying,
But the oubliette alone will let you think while dying.
— Bokonon, Cat's Cradle by Kurt Vonnegut
Did You Know that a prison with only a hole at the top as an exit is called an 'oubliette'? It was on my word of the day calendar last week!
— Twilight Sparkle, My Little Pony: Friendship Is Magic (IDW) issue 3