10 Most Infuriating Movie Cliffhangers

4. Does He Remember? - Oldboy

Oldboy is without question Chan wook-park's masterpiece, a dark, gritty, gripping thriller that is difficult to look away from even as it broaches difficult, brutal subject matter.The film revolves around a businessman named Oh Dae-su, who is imprisoned for 15 years before being released, at which point he seeks about getting revenge. He ends up falling for, Mi-do, a chef at a local restaurant, only to discover at the end of the film - and this is a mega spoiler alert - that she is, in fact, his daughter who was taken away from him once he was imprisoned.

In Oldboy's final scene, Oh Dae-su has himself hypnotised to forget that Mi-do was ever his daughter, and upon meeting up with her, gives her an embrace, and the camera closes in on Oh Dae-su's face, which changes from joy to anguish, leaving us unsure as to whether the hypnosis ever worked. Though it's undeniably brilliant, it's also one of those crushingly inconclusive endings that just makes you want to know once and for all what happened.