Once I was in a toilet, something strange happened. I was in the cubicle doing my business. There was another cubicle (empty) beside. Suddenly someone banged on my cubicle door repeatedly. I was angry but I never make any noise. I finish my business and open the door. There was no one in the toilet. The main door was shut, if someone went out that way I would have heard the door slam. But no. It's strange and kind of scary. (Memory collected at the Cheng San Public Library during the "irememberGhost stories" campaign from 27 Sep to 30 Nov 2012)