"He managed to get himself into a creek and emergency services were called.
"He had quite extensive partial thickness burns predominantly to his buttocks region and some to his lower legs and one of his hands.
"It was quite serious, and quite extensive as well."
Clark said it appeared the group the man was with had been drinking before the incident.
The helicopter crew transported the man, in his 20s, to Middlemore Hospital which houses the National Burn Service.
Clark said while getting in the creek was a good idea to cool down the burns, they were effectively open wounds and the risk of infection was extremely high if the area was exposed to bacteria.
It is understood the man was pushed by someone that he knew.
Police confirmed they were called to the incident.
"A man sustained serious, but non-life threatening injuries and was airlifted to hospital and has since been discharged," said a spokeswoman.
"Police are investigating the circumstances around what happened and are making enquiries.
"No charges are being considered at this stage."