Fire fire~

Yesterday morning while on my way to school, I saw a bus caught fire at Boon Lay interchange. Fortunately no one was on board. Only the back of the bus was on fire, and I was wondering whether any explosion will occur. Maybe I watch too many movies. Anyway, I saw a bus captain pulling a hose and was trying to extinguish the fire by himself. Where were the rest of the drivers?

The alarm in the interchange was switched on and an annoucement was made. I only remembered a sentence. "Please standby the speakers for further instructions." Who would do that?