OLD BOY - Just to make a point

I was watching this movie "OLD BOY" It was quite confusing at first but the plot gets better and better.. The story line is about a man (Josh Brolin) who was obsessed with vengeance, a man sets out to find out why he was kidnapped and locked into solitary confinement for twenty years without reason. He found the man who kidnapped him and asked him this questions :

1. Who am I?
2. Why did I locked you up for 20 years?
3. Why did I let you go?

Normally we would be able to predict the ending of the movie but .. they are really good and left us quite puzzled till almost the end of the movie.. You guys got to watch this.. Not suitable for kidz.. Just adult viewing..

Lesson learned : Never act as if we know everything and that it's cool to make fun of people.. coz you never know .. people might take things personally .. and they will go thru so much just to make a point ..