I've always loved the way tree sap slowly flows down some trees. The motion of the sap droplets perfectly preserved on some cooler days. You know the sap is actively flowing, but at a rate undetectable by the human eye. One droplet I captured in the top left of the picture happened to be shaped like a crashing wave. It was as if nature had been moving in perfect fluid motion and then froze as I arrived to take the picture. On the right side of the picture you can see a stripe of tree bark in focus, still wet from when previous lines of sap had spilled from beneath the bark and flowed to the ground. The droplet on top likely would have followed in the footsteps of its predecessors, just as waves wash up on the beach in the same place as every wave before it.
