Clouds.
I think this picture is actually pretty horrible but there were NO CLOUDS IN THE SKY! I was in the car heading away from work and when I came over the hill to hit 280 I saw the marine layer trying to creep over the hills that separate Palo Alto from the Pacific ocean and screamed CLOUDS! It was either this or get creative somehow (there hasn’t been a cloud in the sky in two days) so I picked up the camera off the passenger seat, pointed it in the general direction of the mountains, pressed the shutter button and hoped it turned out well because it was all I was going to get.