Community Visits the Prime Material Plane

Community's annual animated episode was a trip into the world of GI Joe, the 80s cartoon/toy tie-in show where Jeff "Wingman" Winger becomes the first GI with the capacity to actually kill people.  Pretty good stuff.  I won't belabor the story too much, cuz the point of this post is this: there's a pretty obvious D&D reference. When Abed's GI Joe persona "Fourth Wall" tries to explain the dilemma that Wingman is experiencing he draws this diagram of the known universe:

Need I say more?