The Wellington man who climbed on and broke a Len Lye sculpture on the city's waterfront says he was bored.
Hunter Macdonald says he was "bored out of his mind" when he saw the 'Water Whirler' sculpture and decided to swing on it.
"I decided to stop and sort of attempt some sort of gymnastic, acrobatic stuff on the sculpture," Mr Macdonald told Stuff.
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"A crowd started to form, sort of egging me on - I think they enjoyed watching it. I was sort of taking it further and further... before I knew it, the sculpture snapped so suddenly [and] came down hard on my head."
The force of the sculpture falling on his head felt like a baseball bat striking him, he says.
A video of the Mr Macdonald posted to Facebook shows him swinging along the 'Water Whirler' sculpture as it bends over the water. As he makes his way across the sculpture, it snaps and he falls in the water.
He was injured and taken to hospital.
The Wellington City Council said on Monday they were investigating the incident along with police.
The sculpture cost more than $1 million to install in 2006. Insurance will cover the cost of repairing it.
The Water Whirler is a motorised pole which emits water from jets set into it as it rotates, creating a water pattern.