Dramatic extended video shows the last tour on White Island before its deadly eruption - and the eerie aftermath.
The video, posted to YouTube by Brazilian tourist Allessandro Kauffmann, shows tourists boarding the boat before heading to the island.
After the boat speeds out, the tourists are seen embarking on the island to begin the tour.
The group is taken around the island like any normal tour before they head back to the boat.
In the next part of the clip, smoke can be seen pouring from the island as the boat speeds away.
Then the panic starts.
"Man, that's terrifying. You can't tell your mum this happened," one woman is heard saying. By this stage, the island is no longer visible due to the smoke.
Ten minutes after leaving the island, the tour boat turns back to help rescue people from the devastating eruption.
Kauffman told The Project on Tuesday he was one of the first to see and film the eruption.
He and his partner Aline Moura saw people lying on the rocks and noticed the surrounding water had turned white.
"Everyone was covered in [ash]... everything was grey," Allessandro said.
"Some people were very, very seriously injured."
Aline and Allessandro heard "screaming and crying" as their boat neared the island.
"Everyone in the boat tried to help them... very quickly the crew started to do first aid... everything they could for the people asking for help."
Aline said people on the tour boat quickly removed their jackets and tops to help keep the burned victims warm.
"When we didn't have any more clothes [to give], we just tried to hug everyone that we could touch [to help maintain heat]," she explained.
The couple acknowledged the bravery and strength of the people injured in the eruption.
"They were incredible. We want to give our love and prayers to them. We hope everyone is going to be okay."
Aline and Allessandro told The Project they will continue their travels around New Zealand.
