I was on my way home from the market when I noticed a very impressive cloud formation. However it was changing so fast that I knew I would lose my window of opportunity if I didn't take a picture immediately. So, I stopped the car and took a few shots with the phone camera. Good thing I did, because less than 5 minutes later, this amazing cloud had changed back to ordinary again.

*For the best view, please look at this image enlarged on black ;-)