Ambient noise that has been going on for just long enough to become your default zero reference point for silence, suddenly cuts off to a truer, deeper silence, a silence that is somehow infinitely more intense than just the absence of sound, like your sense of hearing has suddenly been plunged below the threshold into a realm of negative nothingness, and then, while you're still trying to come to with how unbearably loud this silence is, it's suddenly filled…
