"I shouted at him to listen and to breathe in for two seconds and out for two seconds ... That got him breathing regularly, but then he started panicking again. He was so panicked he kept rolling the board and going under."
The girls signalled for help, which came in the form of a man who swam out from the beach and two teenagers who paddled out on surfboards to rescue a third member of the group.
Sabrina persuaded the large man to concentrate on breathing and kicking while they made their way to a small bay around the rocks. They were halfway to shore when more rescuers arrived in an inflatable, a dinghy and kayaks.
But that wasn't the end of Sabrina's problems. The big man was afraid to let go of her board, and when he finally did take hold of the boat it took a good 10 minutes to hoist him on board. They were taken back to the beach where two ambulances, police, a Kaeo fire appliance and the Northland Electricity rescue helicopter were waiting, everyone expecting the worst.
Nine people, including the girls and two rescuers who had swallowed a lot of water, were taken to Bay of Islands Hospital by chopper and by road. All were subsequently discharged.
"We were perfectly fine, but they wanted to take us to hospital to check us too," Amohia said.
Though both live in Auckland, Amohia (Te Rarawa, Ngati Kahungunu) has close ties to Northland with family in Kaitaia. The pair, who are spending a month at Matauri Bay Holiday Camp with Amohia's family, became friends through Sea Scouts, which they said gave them the skills to initiate the rescue. They have not had specific rescue training but have completed many man-overboard drills and know what to do with people panicking in the water.
They are being hailed in the motorcamp as heroes, but they're not so sure.
"Possibly," Sabrina said.
"I guess so," Amohia added.
"The rescue boats came, but if we didn't give them our boogie boards they would've drowned. They were already under water."
The rescued men, in their 30s, live in Auckland and had been holidaying further north but stopped at Matauri Bay to test the water.