The Shining foreshadowing

In a film like the Shining where events in the plot at the end of the film maybe unclear during viewing, foreshadowing becomes very important for the audience to go back to earlier in the film to see why something occurred. Kubrick has little things in the beginning of the film that set up major parts of the film at the end. For instance, when Jack is told that the previous owner of the hotel went absolutely mental at the start of the movie. A little seed is planted in the story and it is then developed over time throughout the film. Then later in the film, you can tell that Jack is on the verge of losing it when Wendy visits him in his office and Jack yells at her and tells her never to interrupt him again. From then on you are constantly paying close attention to Jack and his behavior. Jack eventually goes off the edge and if you go back to the start of the film, an idea that was planted early in the movie now is prevalent. There are plenty of other examples of this that Kubrick foreshadowing things that play a big role in the end.