Your Death Mirror by Raitt Emmel Hall is a flash fiction piece about mirror which reveals how a person will die. The group of friends who decide to take a look have mixed reactions, so everyone splits up and goes their separate ways. Even with the foreshadowing, the author still managed to surprise me in the very last moment. Not exactly frightening, but still upsetting.
From a reader's perspective, I think foreshadowing is one of the most difficult elements an author uses in a story. Too much and the suspense is ruined; too little and readers might lose interest. I've even seen some clever authors use foreshadowing as a form of misdirection...some detail mentioned more than once, so you know it's significant, but not in the way you thought. Just one more thing to love about story-telling.