The last part of that film just destroys me. The way you hear the shot off camera, the caw of the bird in the autumnal gloom, the way the assassin stands in the boat, the way Michael watches from the window and turns away... Then, just to really twist the knife, Coppola finishes with what is arguably the most brilliant flashback in cinema history. I could write an essay on that scene alone. The layers of irony, the nuances in all the performances (especially Pacino), the way Michael is left alone at the end, apart from the surprise welcome of his father. The dissolve to that eerie shot of him as a child with his father on the train, and mixing through to the final brooding shot of his isolated by his appalling achievements... I get chills just thinking about it.