Loud Bang that Echoes

There are two loud gunshots. One at about 8:35pm in Fernvale. It is very loud that it echo. Someone must have loud gun or using a gun for construction. I heard the same bang in downtown Shenton Way as well. It is quite unusual as it is a sound blast and then nothing. I wonder if any of my readers living in SengKang or Fernvale heard this extraordinary gunshot bang.