Weight is the enemy. Under this old Lotus motto, Porsche set about developing a new racing car specifically for the European Hillclimb Championship in the mid-sixties. With a body as thin as a lace doily and a tubular frame made from slightly thicker knitting needles, the Porsche 910/8 and 909 Bergspyder taught both their drivers and their competitors the meaning of fear. This article tells the story of how these featherweight racers came about and shows them in many historic pictures.