I stayed up all night watching it and I'm a little groggy now. The movie is roughly sixteen-years long, but well worth it! It's a twisty psychological-thriller and black-comedy that keeps you guessing as to what will happen next. Chan Wook-Park keeps the momentum going with his breath-taking cinematography, shocking twists and gleefully black humor. I watched it until well after midnight and had no idea how much time had passed until it was over whereupon I collapsed on my bed only then realizing how sleepy I was. I didn't noticed at any point during the movie. Thanks again, Mr. Park for blessing us movie fans with your mad genius!