This is the additional weekly image thread for the Nature Forum. While images posted to this thread should still be nature in theme, it may contain a small amount of human-made objects and therefore less restricted than the Monday in Nature threads. Please see this discussion for more details: Alternative weekly thread in Nature forum Each participant please post no more than just one image per weekly thread. Every once in a long while a truly unique photographic opportunity presents itself. One of those, for me, was a thunder and lightning storm that circled around my home from west to north-east, close enough for a clear view of the action, far enough away to be reasonably safe, and just after sunset, presenting excellent contrast with still enough light to see the clouds. I don't know if I will ever again see the same and be able to capture it. Will you share an image that you consider a once-in-a-lifetime opportunity?