The precautionary approach

Apparently,the indignats will leave Plaça Catalunya today.
Today, at noon there were only a few people and fewer shops and stands.
However, there were some photographers looking for a good photo (I included).
In this picture you see a girl cautiously approaching its target. It seems that if the snail note her, it will go away.

There is still a mistery in this photo (like the looking for to wally game). Where are Mr. Rajoy and Mr Monti?
Perhaps, if compared with the picture my friend Estela took a few days ago you may have the answer.