Breaking the fourth wall
Breaking the fourth wall refers to a situation in which a character reveals his or her awareness of the audience (this can also be called metatheatre). The technique has been used for millennia: it was standard practice in Greek comedy. For instance, at one point in the Greek playwright Aristophanes' play Peace, the hero Trygaeus (who is being lifted into the air by a crane situated offstage) tells the crane-handler to be more careful.
In reference to the Smurfs cartoon show, there have been some instances where a Smurf character "breaks the fourth wall". At least in two known instances, Papa Smurf has done so at the end of "The Fountain Of Smurf" and "Papa's Day Off", and Grandpa Smurf has done this in "Lost Smurf" during an escape.