references

did anyone notice that throughout the movie, you can see bits and pieces referencing his other movies.
for example, when ji-woo was editing a video clip on his computer, it was a prison scene take from <3-iron>.
and when ji-woo was chasing sae-hee through the underground, there was a poster on a pillar next to the bird-cage/exhibition that read <Spring, Summer, Fall, Winter>.
there were probably more, but those were the two that really stuck out in the film.