What does the sign that this guy is doing in the picture mean? A positive way of reading could be to say that this guy is breaking the surface in the image. A image of him as a poor. But the one in control here is the one who’s behind the camera.
And this is rather a sign that says Hello in a more specific way.
It’s a surfers sign. And in this case it's about the surface. Being above or under the surface.
A young kid doing the hang loose sign from his perfect position as a poor.
Traditional. As used in the Hawaiian Islands, "Hang Loose or "Shocka" is used as a non verbal expression; or greeting. To tell the receipiant, that every thing will be OK, Relax, Stop looking at me w/ that stern look on your face. / from Urban Dictionary