10 movies that shock and awe

"Oldboy" (2003)

Tagline: 15 years of imprisonment, five days of vengeance

Director: Chan-wook Park

The plot: After being kidnapped and imprisoned for 15 years, an innocent man has five days find out who captured him and make them pay. One of the finest in Korean revenge film genre, "Oldboy" may not be more shocking than the other films Park’s series, "Sympathy for Mr. Vengance" and "Lady Vengeance," but it's better realized. 

The shock: Live octopus eating, tongue extraction and some brotherly love.