Macdonald only succeeded in snapping the needle-like pole, titled Water Whirler, and hurting himself.
He told Stuff: “I was bored out of my mind. A crowd started to form, sort of egging me on. I think they enjoyed watching it.
“That’s who I am. I’m a show-off but it bit me on the butt this time. I never meant to damage the sculpture.
“At that point I’d realised that I’d made a serious mistake.
“I’ll be expecting a court date. The police took my details at the scene.
“I’m willing to do whatever’s required, you know, because that’s the best way to show remorse.”
New Zealand artist Len Lye’s project had been under repair for two years. Its worth is an estimated $NZ300,000, but over $NZ1 million has been spent on it.
“To see it snapped off in a pretty public display of stupidity really was unfortunate,” Wellington mayor Justin Lester told TVNZ.
“Ideally the perpetrator would pay but I suspect they won’t have insurance.”