《汉书·传·张冯汲郑传》
过了好久，以为皇上已经过去，便从桥下出来，见到皇上的车马和仪仗队就在眼前，立即转身跑了。 
久，以为行过，既出，见车骑，即走耳。 
After a period of time, assuming the Emperor had already passed by, he emerged from below the bridge, saw the Emperor's carriage and honor guard right before his eyes, and immediately turned around and ran.