I���ve always enjoyed storytelling hiccups that involve the ���fourth wall��� ��� you know, that imaginary barrier between fictional characters and the audience. The name, fourth wall, comes from theater where performances have three physical walls, to the left, right and behind the stage. Characters in a stage play aren���t supposed to know that somewhere off in that fourth direction, there are people watching them. Once in a while, those characters figure it out, and that���s when the comedic fun begins.