Family Tree Frog

Alan on Sepia Saturday says: Danger is an odd thing. In our moments of sanity we all steer well clear of danger, but in those moments of exuberant insanity, we sometimes search it out in order to experience the thrill of the challenge. Why else would you get people sky-diving or sailing blindfold across the Pacific Ocean or cultivating nettles? But one man or woman's danger is another man's relaxing lunchtime drink. Here is a photograph from the Dextra photostream on Flickr Commons which I would really like to tell you more about but I am constrained by my lack of - I suspect - Norwegian. Given the international flavour of the Sepia Brotherhood (Sisterhood), I am sure someone will let me have a translation of the  Flickr description. It doesn't really matter because we are concerned with images rather than words and what this image says to me is danger. So your challenge this week is to somehow link an old photograph with the concept of danger (or anything else you...