 Meanwhile, Mallory and Miller infiltrate the gun emplacement, but set off an alarm when they seal the doors behind them.Miller plants explosives on the guns and prepares a large booby trap below an ammunition hoist, with a trigger device set into the hoist's track.The Germans eventually gain entry into the gun emplacement and defuse the explosives planted directly on the guns; meanwhile, Mallory and Miller make their escape over the cliff, reaching the stolen boat.