My primary school is strange. Once, we were having recess. So we were all playing at the parade ground. My classmate pointed to me a classroom at the 4th floor. We looked up. There is a lady there standing at the window looking at us. We look at each other and then we looked up again. She had disappeared. (Memory collected at the Cheng San Public Library during the "irememberGhost stories" campaign from 27 Sep to 30 Nov 2012)