We're going to go on a dive to the deep sea, and anyone that's had that lovely opportunity knows that for about two and half hours on the way down, it's a perfectly positively pitch-black world.
Vamos a sumergirnos en las aguas profundas. Cualquiera que haya tenido la suerte de hacerlo sabe que, durante unas dos horas y media hacia abajo, es un mundo total, completa y absolutamente oscuro.