Just before noon last Friday, I was driving along New Upper Changi Road and was about to turn into Bedok North Avenue 3 when I heard a loud explosion at the back of my car.

Alarmed, I immediately stopped to check and found that my left rear glass window was shattered.

I realised that the breakage was caused by a flying stone propelled by a grass cutter who was trimming the grass by the pavement.

The impact of that stone was considerable, judging from the complete destruction of my window.

What would happened if the stone hit a person?

That pavement is frequented by many people, especially children and the elderly. It has a pedestrian crossing and leads to Bedok Point, Bedok Mall and the hawker centre.

There were at least four grass cutters operating in the vicinity at the time.

With the fast revolving speed of their uncovered nylon cutters, any solid object they hit could be a potentially lethal projectile.

The National Parks Board should look into the safety aspect of grass cutting before someone gets seriously injured or even killed.

Michael Goh Keng Guan