Twenty years before my first trip to Africa, I saw a shot of a leopard silhouette in a tree at sunset in a National Geographic publication. I never forgot it. Silhouettes in low angled sunlight are commonly seen while on safari, but what makes them dramatic is when a long telephoto is used. This exaggerates the size of the sun and makes the effect visually compelling. There is a lot of dust during the dry season, and that often makes the sky dramatically orange when the sun gets low enough. I used a Canon 500mm f/4 telephoto for this shot, and my settings were 1/2500, f/13, and 200 ISO. I was able to use such a fast shutter speed and a relatively small aperture because there was so much light from the large sun. This is a situation where the histogram would be deceiving because it would show a definitive 'spike on the right.'