The Knights of the Round Table are sharing stories Sir Lancelot is speaking: So, dear sirs, I was fighting this dragon with three heads. I chopped one head off, it grew two more. I chopped two off, it grew two more. I chopped three off, it grew five more. I chopped one off, it grew none. I chopped one off, it grew three more. Sir Galahad interjects: So how did it end? Well, after chopping for half an hour, I still could see no pattern there.