Clouds can take on many fascinating, lifelike shapes. The double-cheeked mammatus protrusion at middle right, conveniently spotlit by a ray of sunset, so strongly mimicked the shape of a human posterior that I just had to take its picture. Mammatus clouds, of course, are named (via a Latin root) after another human body part--the mammaries. The SW corner of the National Weather Center edifice appears at left. Several minutes after sunset, the entire sky had assumed a more subdued hue, and the vaporous derriere had disappeared.
Norman OK (7 May 11) Looking ESE