What do you do when you feel like you're the only person in the world who has seen a strange phenomenon? You take a picture, right? Just so everybody knows you're not some alien-abduction-style crackpot, you've got to get the thing on camera.
So these things might not be quite on the level of flying saucers and little green men, but they were still weird enough that someone had to get a pic and that's pretty compelling.