Alternative Character Interpretation: Tae-goo's past is mostly an enigma. Why did he leave Korea? Did he regret the things he did, or was he just putting on an image to throw off his enemies?
Ass Pull: Tae-goo's survival of the final shoot-out in the Korean version. Although some could argue that Tae-goo and Do-won dying in the international version made watching the film entirely pointless.
Canon Foreigner: Man-gil and Byung-choon have no counterparts in the original film.
Crazy Awesome: This is how Tae-goo has managed to stay alive for so long. In the extended ending, he even survives by wearing a metal plate beneath his quilted shirt.
Draco in Leather Pants: Chang-yi fits the mould of an ideal bad boy. He's dark, he's brooding, sexy and tortured. Which makes people gloss over the fact that he's a neurotic psychopath who brutally murders people, and who hate Tae-goo for mutilating him in the fight.
In the extended ending, while preparing to blow up Chang-yi's corpse, Tae-goo finds himself surrounded by the Japanese army, so he threatens them with a stick of dynamite and flicks the lighter close to it. The army retreats, and Tae-goo slowly realises that he actually lit the dynamite by mistake. His reaction is priceless.
Tae-goo wearing a diving helmet in the Ghost Market fight. He spends the fight running around trying to keep his balance and attempting to shoot Chang-yi's thugs wearing the heavy thing. Furthermore, the diving helmet proves to be very tight as well.
Tae-goo finally gets to the place where the treasure is supposed to be, and searches for it through a pair of wallet binoculars... only to find the end of Do-won's gun barrel instead.
Early in the film, when Tae-goo takes the map and goes up to rest in his room. Byung-choon and his thugs spot Tae-goo walking upstairs and hope to kill him and try and get the map. Unfortunately for them, Tae-goo hears their approaching footsteps and calls out, "Who is it?" and Byung-choon, on the other side of the door, accidentally reveals himself. It's his frustrated expression that's so funny.
Foe Yay Shipping: There's lots of fanart pairing Do-won and Chang-yi, because they're both pretty boys.