Plot twists and major reveals are extremely handy tools filmmakers use to keep the audience on the edge of their seats and always guessing about what will happen next. When handled properly, twists can add a healthy amount of substance to the final narrative, giving viewers a new aspect to chew over, leading them to see certain elements in a different light. They also, by definition, all but warrant repeat viewings, since the revelations change the perception we have of a movie and how we interpret key scenes and moments.
But even if twists are played up for the surprise factor, it doesn’t mean they come out of the blue to mix things up. Directors have shown they’re willing to include little hints of what’s to come, giving attentive viewers a head start on learning all the deep secrets.