《汉书·传·张冯汲郑传》
不久，皇上行经中？胃桥，有一个人从桥下跑出来，使皇上驾车的马受了惊。
顷之，上行出中渭桥，有一人从桥下走，乘舆马惊。
Not long after this , when the emperor was passing Zhonggu Bridge, a man came running out from under the bridge and frightened the horse.