Not what you'd expect to see in a poem with so much "Fun," but what can we say, Billy rolls hard. In stanzas 6 and 7, things take a markedly dark turn. Instead of exploration and fun, we get… medieval. Not fun. It is also interesting that the images in the previous stanzas are all very free. There is freedom and movement inherent in exploration, adventure, and fun. All that movement is gone in the last two stanzas.