PeggySue,

I think the girl hit the lottery. Got lucky and 'snapped' a shot. I believe that a monkey hitting keys at random on a typewriter keyboard for an infinite amount of time will almost surely eventually type the text for the book "War and Peace".

In this case the girl was in the right place at the right time and had the initiative to think of her phone camera and take the shot. Good for her. And if she had not tweeted it no one would have ever known about it.

So I see this more in a lesson of how do you get paid for the third parties that profited on your work. I found Carolyn Wrights advice spot on. The one gotcha in here is Tweetpics rights to resell, something I wasn't aware of.