2. When Thomas is first put into the Box, he sees a girl named Teresa who says, "They're going to kill you." This foreshadows the fact that Thomas will be in danger throughout the book.
3. When Thomas and the other Gladers are running through the Maze, they come across a dead Griever. This foreshadows the fact that they will eventually have to fight the Grievers.
4. When Thomas and Teresa are escaping from the Maze, they come across a group of people who are called the Creators. The Creators tell them that they are responsible for creating the Maze and the Grievers. This foreshadows the fact that Thomas and Teresa will eventually have to confront the Creators.
5. When Thomas and Teresa are reunited with the other Gladers, they are told that they have been chosen to be part of a special mission. This foreshadows the fact that Thomas and Teresa will eventually play a key role in saving the world.