Towards the end of the Xingding 興定 era (1217-1220 CE), a peasant from Caozhou 曹州 was walking along the road one day, when he was caught in a sudden shower. From the empty air a voice spoke: “Brave enough?” He then heard a loud laughing sound. The person went on a further half-li, and saw a large willow tree torn up by its roots and thrown several dozen paces. In the mud there was the print of a great thigh and buttocks, about as big as a grain container. That spirit must have pulled up a tree and then just fallen on its back and laughed!
Yuan Haowen 元好問, Xu Yijian zhi 續夷堅志 (Continued Records of the Listener), 2.26:
Yuan Haowen 元好問, Chang Zhenguo 常振國 (ed), Xu Yijian zhi 續夷堅志 (Continued Records of the Listener), and Anon., Jin Xin 金心 (ed.) Huhai xinwen yijian xuzhi 湖海新聞夷堅續志 (Continuation of Records of the Listener with New Items from the Lakes and Seas) (Beijing: Zhonghua shuju, 1986)