Oldboy
Park Chan-wook · 2003
Right after his release, Oh Dae-su eats a live octopus. The octopus was real, and 4 were used during filming. The scene is about animal hunger and about crossing back into the world of the living. It also shows how far the film itself will go past what movies normally show.
Where to see it: The sushi restaurant scene. Oh Dae-su eats the octopus alive. Its tentacles are still moving on his face before he collapses.