A CRANE has toppled into Sydney Harbour before flicking the iconic amusement Luna Park in the face as witnesses describe hearing a "huge bang".
Luke Bayly described how he was sitting on the opposite side of Sydney Harbour when he saw the crane collapse at around 1:00pm.
The crane was operating around Milsons Point, an affluent suburb on the lower North Shore of Sydney.
"It was a huge bang, it startled me, I thought a bomb had gone off," he told ABC News.
The crane toppled, then later, a cable snapped from the submerged crane and flicked the iconic Luna Park amusement in the face.
Luna Park, located in Milsons Point, is on the northern shore of Sydney Harbour where the crane fell. It said it had no comment on the incident.
Witnesses say they could hear a loud splash as the giant structure toppled into the water.
"I was sitting on the other side of the harbour," Mr Bayly said.
"I heard a huge bang. I looked up and I saw the crane splash into the water."
Workers from Waterway Constructions are currently on the site.