I have decided this is the best film I've ever seen and I'm going to watch it again right now.

My favourite part is alternately when Oh Daesu watches the news and sees he's been set up, and after he gets out and subsequently finds out his daughter was sent to Sweden - and then tries to grin through the pain. His face in both those scenes convinces me that this guy is either an amazing actor, or the director shot his mum to get the shot. Either way, it works for me.