Our heroes find themselves at the docks. The baddie or monster is lurking somewhere nearby; unfortunately, there's a whole mess of shipping containers piled up everywhere, forming an environment like a maze. The containers all look similar, so searching for the target is confusing for both the heroes and the audience. There could be anything lurking around any corner, or in any of the containers... Any environment with a large quantity of similar-looking stackable items is a great candidate for one of these, e.g. packing crates in a warehouse, or cardboard boxes in a storeroom.