Clickonline writes: "Katis has described the lurking mines as ‘monsters in the dark’ and they serve that narrative purpose here – popping up when least expected to devastating effect. Mines are not designed to kill but rather maim, serving to draw in more victims who try to help their fallen comrades. And that sickening reality is realised to great effect by the supremely talented makeup designer Cliff Wallace."
Paul: "It’s more akin to Jaws than American Sniper. And there was a requirement to do those things that those movies do to keep that tension and ratchet it up with a hidden enemy. So we couldn't even see a dark shape in the water, or use a deep cello sound. We couldn't do that because it’s literally hidden"