I don't go out of my way looking for these set-ups nor do I wait around a long time until they're complete with subject and background to complete the shot. I will shoot this type of scene if I come across it spontaneously though(and gladly) as in this case. The thing I love most about the background poster is how it represents the Chinese slang for exaggerating 吹牛. Of course I equally love the old gent sitting there waiting for his bus non-plussed by the absurd image behind him. Moral of the story it pays to walk around and all over to explore and discover this kind of serendipity.