It seems that NTU has been really cold these few days. Here's how you know that its really cold.
1) The fans at the CS benches are now avoided.
2) Long sleeves and jackets are now in.
3) The lecture theatres are warmer inside than outside.
4) The shuttle buses have closed aircon vents.
5) More people are coming late for lectures because they can't get out of their warm bed in the mornings.