Anders Gjennestad is the artist responsible for these awesome, gravity-defying kids playing on the wall. Anders specializes in creating shadow people using his own photographs. The stencils he uses are hand cut and layered to create a detailed and complex photorealistic images. It also helps that his work is perfectly placed to fool the eye. The installation above was part of Memorie Urbane, a street art festival in Italy. Anders is currently based in Norway where his street handle is Strøk.
Have a look at his website.