Parents watching their children getting murdered (Lady Vengeance)

From the movie Lady Vengeance by Park Chan-wook. This is the most intense scene of the film and one of the most emotionally disturbing scene of all movies, even though very little actual violence was shown. In this scene Geum-Ja shows four families what happened to their children which were abducted years ago and never seen again, despite the parents paying a ruinous ransom to the kidnapper. Geum-Ja captured the murderer for revenge, because he coerced her to admit to a child-killing he committed and went