SINGAPORE - The Myanmar worker was decorating a float when he heard a crash nearby.
Mr Kyaw Min Tun, 23, rushed out to the road from Block 28, Defu Lane, in Hougang, and saw about 10 men running out from the construction site across the road.
The boom of a crawler crane in the site had collapsed and lay in a twisted heap.
The crane's metal tracks even ended up in a vertical position.
"I was scared. I remember thinking that this site is not safe," Mr Kyaw, who has been working in the area for three years, told The New Paper.
One of the security officers from the site said that the accident occurred at about 1.25pm on Tuesday.
The officer, who did not want to be named, said that there were about 40 people on the second level of the building that is being constructed and about 10 people on the ground.
A spokesman for the Ministry of Manpower (MOM) said that the accident happened at Boustead Projects' worksite and that officers from MOM's Occupational Safety and Health Division responded immediately and were at the scene to investigate the situation.
Their findings showed that the crane operator was raising the crane jib, when the crane toppled backwards.