Foreshadowing is when you show an object with a special look that later happens to someone or something. 

Ex. - In S4E1 there is a base in Gale's apartment that has a face with pink paint on one side, white on the other (it can also be a symbol of Jesse and Walt's partnership - see why on the trivia) and in S4E13 Gus' face is burnt in half. 

Feel free to add more and use your own!
Screen shot 2013-01-22 at 8.27.50 AM