Shrub Swaying in Wind
The sky, as you can see, is preparing for a storm. I can usually tell when a storm is coming. There's probably a logical explanation behind it - y'know, beyond "there are dark clouds overhead" - but I only base it on my feeling. You can smell what's coming, feel the static in the air, and see it in how the trees swing; it all creates this portentous "aura" that you can just feel, and know the rain is here, not just passing through.