I was out on the porch yesterday just relaxing and the weather was starting to take a turn. A small patch in the sky caught my eye where I saw rain clouds rushing in, while the same rain clouds were blocking the sun and making an adjacent cloud shine... I ran in, grabbed my camera and took few shots. Here's one of them,

The reason for taking this shot is the contrast between the dark and bright clouds in the nice blue background. Therefore, made sure to underexpose the image using exposure compensation on my Canon T3i (AV mode).