The settings was in one of the MRT cabinets of the North-East Line. There were 2 Indian passengers sitting across me. Apparently, one of them was having some fun with his brick-looking camera phone and was trying to take some snapshots of this friend.
From the huge screen of the camera phone, I could see pretty clearly that his rubber-face friend was doing a really good job, making all kinds of hilarious expressions. Couldn't controlled myself and burst out giggling.
The rubber-face fellow saw me giggling and started laughing too. He then signed his friend to stop taking the pictures. Got off the train at that moment. Was still giggling away after that though .... :P