If you ever visit Seaport Village, there’s a good chance you’ll see the fellow on the right and his amazing gallery of balanced rocks. He hangs out behind the wall at the water’s edge, right next to the grassy park. (The park is called Embarcadero Marina Park North, by the way.)
People passing by are encouraged to take photos and try out their own rock balancing ability. This lady was having a lot of trouble. Even a small rock edgewise on a water bottle isn’t easy.
With a little cheating she finally succeeds!