There is a scene in the movie where there is a long shot of mountains on the horizon -- and the subtitle identifies the scene as taking place in Dallas, Texas.
I grew up in Dallas, and there sure aren't any mountains on the horizon!
This is obviously an attempt by the film makers to add to the surrealism of the film, by juxtaposing a mountainous region with the label "Dallas, Texas", which is flat.
Either that or they screwed up...