My grandfather took the original of the above photo, I recently acquired the camera he probably used to take it. He was brilliant...

I don't usually click on "everyone's photos" but recently I did, to discover that the picture I clicked on contained someone I know! Is this normal? I mean, isn't "everyone's photos" EVERYONE? Or is it by geographical area? I mean, was this an oddity, or super duper holy-hell freaky? Because I'm just wondering... (that last part being comprehensive)