What strange people photographers are

Imagine the scene. You are walking along, minding your own business, chatting away with your friend, when ahead of you on the opposite side of the road you see a guy with a camera in hand, just waiting. Waiting for what?
He seeing you seeing him, raises the camera to his eye and appears to photograph the blank wall opposite him. This same wall you are approaching. Soon you will enter his frame if you don’t stop. You stop.
He stops.
He gestures with his hand to walk on. You walk on. He snaps, snaps, snaps.
You breathe a sigh of relief as you leave his frame and shake your head in bewilderment as to why anyone would want to take a photograph of you walking past such a nondescript wall.
The photographer views his image and he nods. Satisified.

End of the line
Self Explanatroy