The wind bent the trees and grasses as the fog rolled quickly over the lower hills at Mt Tamalpais on a late spring evening. Most of the time when there is low ocean fog, the skies are clear, so seeing higher clouds in the sky is a rare event. I used a 1/2-second exposure to show a little motion in the fog and the foreground grasses. I like including motion whenever possible even if it is extra work. I had to shelter the camera and tripod with my body in order to avoid camera shake.