- The film was once listed as the "Top 15 Revenge Movies" on the Rotten Tomatoes website in the United States.
- The scene of Wu Daxiu eating five live octopuses raw at a sushi restaurant caused huge controversy. Although eating octopus raw in Korea is commonplace, it is usually eaten by cutting it into slices. After the film won the Cannes Grand Prix in Cannes, the director shared an octopus meal with all the cast and crew.
- In order to fit the role of Wu Daxiu more physically, Cui Minzhi trained for six weeks and lost 20 pounds. Most of the stunts were performed in person.
- It took three days to shoot the scene of the famous long-lens corridor. In order to make the result look more like a long shot, no CGI editing and processing were used. It is completely shot to the end with one lens. The only place in the scene where CGI technology was used was when Wu Daxiu was inserted through the back with a knife.
- Wu Daxiu visited this flashback passage in the former school, and he carried out color correction in post-production, and brown became the main hue.
- Mr Han (Kang Heyong) only said one line in the whole movie.
- The last scene of the film (with snow and footprints) was shot in New Zealand. After the credits of the credits have all ended, the audience can still hear the sound of the wind. This is indeed the sound of the wind recorded at a shooting location in New Zealand. In an interview, the director revealed that he was deeply moved by the beauty of New Zealand, so he kept the voice there for the (Korean) audience.
- The restaurant in the movie is called "Mediterranean", which is the real name of the restaurant. The director originally wanted to call it "black", not referring to the prevailing Japanese manga Manga culture, but referring to the Japanese director Akira Kurosawa.
- The elevator code for the cabin is 0604. Enter this number on the official website to register as a member here. ·Cui Minzhi is a Buddhist. After eating octopus, he must pray.
- Display error: Wu Daxiu walked into a room in his territory, and his computer screen displayed stock trading information. The URL displayed on the screen is: C:/DocumentsandSettings/[.]/#OldBoy#/[.], this should be a folder on the computer, not the website address.
Oldboy behind the scenes gags
2021-10-13 18:32
Extended Reading
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Dae-su Oh: The TV is both a clock and a calendar. It's your school, your home, your church, your friend...
[Dae-su masturbates to a pop star onscreen]
Dae-su Oh: ... and your lover. But... my lover's song is too short.
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Dae-su Oh: Laugh and the world laughs with you. Weep and you weep alone.