The only way I can explain the film's brilliance is with total spoilers.
The movie reaches the pantheon of the top 1% not just because of the dialogue but because it violates all expectations of the genre:
Situation 1: You have the smart, handsome guy fooling around with the girl that his dumb best friend really loves. Expectation 1: The smart guy will give up the girl so his buddy can have her.
Situation 2: Smart guy knows she's a tramp Expectation 2: He proves it to buddy before he gets married...OR they get married, and he keeps it to himself.
Situation 3: Tramp marries dumb guy Expectation 3: She reforms (or is killed)
NONE of my expectations (based o seeing over 9000 films) came to pass. The only Expectation that did was that when dumb guy finds out smart guy slept with his new wife, he tries to kill him (in obvious way since they're building a skyscraper).
Finally: the last scene is perfect. Smart guy plays the same trick he did on dumb guy earlier in the film to show she's OK with the attempted killing.
Situation 1: You have the smart, handsome guy fooling around with the girl that his dumb best friend really loves. Expectation 1: The smart guy will give up the girl so his buddy can have her.
Situation 2: Smart guy knows she's a tramp Expectation 2: He proves it to buddy before he gets married...OR they get married, and he keeps it to himself.
Situation 3: Tramp marries dumb guy Expectation 3: She reforms (or is killed)
NONE of my expectations (based o seeing over 9000 films) came to pass. The only Expectation that did was that when dumb guy finds out smart guy slept with his new wife, he tries to kill him (in obvious way since they're building a skyscraper).
Finally: the last scene is perfect. Smart guy plays the same trick he did on dumb guy earlier in the film to show she's OK with the attempted killing.