Okay, so as I'm looking through pictures this game may not be as easy as I thought, but it could still be fun if people are willing to give it a try. Basically the concept is to post a photo, then have someone post another photo that takes an element that was not the focus of the first photo and make it the focus. For example, with this photo:
a followup could be something focusing on a tree, a hat, glasses, sparklers, just anything that is an element but not a focal point.
I look forward to seeing how this turns out.