In a video posted on Facebook last night the stuntman, who goes by the handle #DrBubbles, can be seen boarding down the rapids before plunging off the falls in front of stunned tourists.
The video by #BeastMoze has already been viewed more than 85,000 times.
Another one shared by Facebook users last February shows #DrBubbles jumping off a bank into the falls, near Taupo.
“From a drowning prevention perspective, which is what we advocate for, it’s clearly irresponsible and dangerous and extremely high risk.
“It’s like playing Russian roulette and ultimately roulette will win in a situation like that.”
Mills said it was a good example of why men make up 85 per cent of all preventable drownings.
“They overestimate their ability and underestimate the risks.”