Several good examples of this technique can be found in the motion picture The Fugitive . In one scene a police car flashes its lights and siren at Dr. Kimble, but only to tell him to move along. In another scene, Kimble is in his apartment when an entire battalion of police show up with sirens blazing and guns drawn. It turns out they were really after the son of his landlord and had no interest in him at all. Red herrings can inject storytelling tension where more structurally related weaving may be lethargic.
Reversals change context.
In other words, part of the meaning of anything we consider is due to its environment. The phrase, guilt by association, expresses this notion. In Storyweaving, we can play upon audience empathy and sympathy by making it like or dislike something, only to have it find out it was mistaken. There is an old Mickey Mouse cartoon called Mickey's Trailer which exemplifies this nicely. The story opens with Mickey stepping from his house in the country with blue skies and white clouds.