One of those things that seems to interest me is when you see an orb in a picture. The hard part is trying to determine if the orb could be something else. There are many times where the orb may be due to dust in the air and the camera just catches just right. Then there are other times when it could be some kind of bug that passed by the camera at the right time. I have also seen some where it was reflection due to moisture on a wet surface.