Spatial Metaphor
Using physical places, like buildings, geography or how high up someone lives, to show something you can't see directly, such as a character's class or state of mind.
How this film uses it
The train is a class system you can walk through. The poor live in the dark tail section, and every car toward the engine is cleaner and richer. Bong framed most interiors with the tail on the left and the engine on the right, so the story always seems to move in one direction.
Where to see it
The protein bar reveal in the tail section. The rebels learn the bars they have eaten for 17 years are made from cockroaches.

















