What a fun, action-packed thrill ride!
If I had to recommend a movie to get somebody hooked onto Korean cinema, I think Exit would be my choice. It starts off like a hilarious romantic comedy and then at around the 20-minute mark suddenly turns into one of the most thrilling action/adventure disaster movies I've seen.
The film delivered on every level as an action film: it has a gripping story that moves at a fast pace, charismatic and likable lead characters who have great chemistry together, awesome action and stunt sequences, and sleek and stylish cinematography that really puts the locations and buildings of Seoul to great use.