Every Simpson's episode has a unique beginning where they all usually end up sitting on the couch. This one was from episode number: 124 (2F19) season num: 6 First Aired: Sunday April 16, 1995.
In this episode the family walks into the living room from all directions, rather like the people in Escher's "Relativity" picture. View the actual opening sequence below.
(C) Fox 1995
Tags: video, optical_illusions, illusions, art