Fourth wall
If an actor speaks directly to the audience, does something to the audience, or even simply notices the audience, it is known as "breaking the fourth wall". In a movie, or on television, this can be done by the actor speaking directly to the camera. This breaks a boundary normally set up or assumed by works of fiction. It is known as a metafictional technique. In literature and video games, it happens when a character acknowledges the reader or player.