Fourth wall

- in the theater, a symbolic boundary betwee n audience and actors in the theater. In fact, the scene is usual ly surrounded by three walls and the fourth is the only conventio nal [1]. Its existence is to isolate the actors that you can focu s completely on his game, without being aware of being observed. Expression destruction fourth wall (called Breaking the fourth wall), the elimination of this limit by a specific actors behavior or form of video games and animated films: it returns directly to the audience, aware of her presence, or give to know that he knows about that is observed.