This is really lovely.
I'm not sure if this is by an artist or a student or some sort of company. I think it's a thesis. This guy projects a speech bubble onto walls, preferably near windows or doors. He then hands out flyers with a mobile number on to passers by. They txt the number and their messages appear in the bubble.
The images he's taken are gorgeous.
I can't help thinking it would make a nice ad campaign for summits. Or great album covers.