We open in hot, thick jungle. The foliage is dense and it’s humid as hell. A howler monkey screams from the treetops. At the ground level, we see a huge venomous spider crawl towards camera. The scale makes it look monstrous – the stuff of nightmares. We follow the deadly arachnid as it creeps through the jungle, hunting its prey.

The spider climbs up a leaf, over some camouflage and then onto the arm of a Royal Marine, who is lying in deep cover aiming his sights on an unseen enemy.

The spider feels its way forward, climbing over the Marine’s radio, along his shoulder and then onto his face. All the while the Royal Marine doesn’t move a muscle. He doesn’t shout or break cover. He maintains his focus directly on his mission. At the end we see the enemy, completely unaware, reflected in the Marine’s eyeball.