VERY EERIE POSTER

Am I the only one who thinks there is something very disturbing about this poster? It looks so calm and peaceful, almost like they’re all having a nice conversation or they’re all greeting each other after being apart for a long time. Also, the surroundings are weird. Daytime in a hay field. Very tranquil.

Does anyone know anything about this poster? Why it’s so strange and why it freaks me out?

http://www.moviegoods.com/Assets/product_images/1020/234683.1020.A.jpg