Importance of Focus Point

What makes the tourist squirrel photo so humorous? Take a good long look at the image. http://www.ottawacitizen.com/technology/Banff+squirrel+photo+gets+huge+attention/1889605/story.html

It's obvious isn't it? It is the fact the camera refocused on the squirrel making the humans the background - less important, more like visitors in the squirrel's world.

If the camera remained focused on the couple, the squirrel would have been a fuzzy blur and all impact forgotten and lost forever. Think about it.