Dawn of the Dead (also known internationally as Zombi or Zombie) is a 1978 Italian-American independent zombie horror film directed by George A. Romero. It was written by Romero in collaboration with the Italian filmmaker Dario Argento and produced by Richard P. Rubinstein. It was the second film made in Romero’s Night of the Living Dead series and shows in a larger scale the apocalyptic effects on society, though it contains no characters or settings from the film Night of the Living Dead. In the film, a phenomenon of unidentified origin has caused the reanimation of the dead, who prey on human flesh. David Emge, Ken Foree, Scott Reiniger, and Gaylen Ross star as survivors of the outbreak who barricade themselves inside a suburban shopping mall amid mass hysteria. (Wikipedia)
Battle Royale has deep things to say about society and is an important landmark film. It is also a great movie if you like this kind of thing you sick bastard.
Zombie: Can one recommend a movie based on one scene? I think I just did.