Helen van Berkel and daughter Grace, 10, experience the rough-and-tumble of Action World.
"Bash her! Smash her!" I cringe, hoping no one from Child, Youth and Family is listening to these instructions as I face off against my 10-year-old daughter, each of us with a giant cotton-bud jousting stick in hand.
I tentatively tap her leg and she whacks my upper arm, hard enough almost to hurt. I fend off what might have been a face shot and almost fall when she lands a good one on my upper thigh, followed with a quick ankle tap. That does it. No more Nice Mummy. I give her a hearty tap on the arm. And instantly feel like Bad Mother when she falls and I win.
Do not try this at home. Truly. The only place this kind of behaviour is acceptable is at Henderson's Action World park, where giant air cushions break your fall and your first half-hour is spent learning how to land - on your bottom or back - and it's can't-stand-up-for-laughing fun.
The park opened in April last year, and is a branch of the park in the Bay of Islands. Another operates in Taupo. Safety is paramount. You can show off your acrobatic skill on a full-size trapeze or walk the high wire, knowing that if you fall you won't be hurt. Owner Gerry Robertson knows his stuff; a former trapeze artist, he was head rigger for the internationally recognised Cirque du Soleil. He oversees the park's structures, with the assistance of his wife, Xandri, also a former Soleil staffer.