I just signed up here tonight to post this, and because it was long overdue as I read threads on here all the time. I was playing episode 4 and I think I came across a possible Easter Egg that may be referencing the original copy of the Wizard of Oz. In the first release of the film, you could see someone hanging from the tree for just a quick glimpse before it was gone. In Episode 4, You get a very similar quick glimpse of the view in the screenshot, and in the background you can notice a body hanging from the tree for just a split second before it shifts angles. After this quick glimpse, I have never been able to see the body again and after several play throughs of the game, have never noticed it, except for this one part.
If you are feeling nice, a "Rate Up" could get this find on the steam community board. Steam Link: http://steamcommunity.com/sharedfiles/filedetails/?id=268563900