Strange Cloud Photo

We elected to post this picture from Laura Reno, because it is sort of strange when you think about it. Something is illuminating this low cloud, and we do not believe it is the light in this picture...whadda' you think? Normal cloud or is something amiss?

"I submitted a photo to your sight back in October of 2005. Anyway, I took these two photo's from my balcony in LA. Do you think it's just a cloud? The sun has obviously set. Could the light under the "cloud" be somehow illuminating it?"