Mr Taufa'ao, a primary school teacher, said he remembered everything about the crash.
"I was thrown out when the bus first crashed ..and I laid down still until the ambulance came," he said.
While he waited, he "just looked at the sky, and thanked God...I was alive."
He relayed how Tevita had remained in the bus when it crashed.
Tevita was the head boy of the Vava'u school, and played the B Bass. The rugby player lost his left leg as a result of the crash, but today he was "feeling happy".
"He knew that his leg was damaged, so he [fainted]," Mr Taufa'ao said. The next the 18-year-old had remembered was waking up in hospital.
While it had been difficult for Tevita's parents, 'Aisea and Polosepina, to fly to New Zealand due to the immigration office being closed over Christmas, they were recently able to reunited with their son.
The men's Tongan support people, Sia Uili from Waitakere Hospital and Akesa Uili Halatanu, the matron at Viola Hospital in Tonga, had worked with the hospital to get visa's for Tevita's parents to come out to New Zealand.
"Because that's their wish to come, and I believed they should be here to support him," Ms Uili Halatanu said.
"There was no feeling like having his parents with him.
"When he saw his parents, there's nothing we could do to replace that."
Tears were shed today, as the men and their families presented gifts from Tonga to the Hospital staff who have helped the two recover.
The men and their families shared their thanks to the staff, and spoke of the high quality care and support they had received at the hospital.
It is expected that Mr Taufa'ao will be discharged from hospital soon. Tevita will be flying to Auckland for further care, and is expected to be able to return home in around six weeks.
He hopes to one day get a prosthetic leg.
A resident who was one of the first on the scene has set up a Give A Little page for the crash survivors. More than $42,000 has been donated.
¦If you would like to donate money to the 46 Tongans who were injured in the crash, visit givealittle.co.nz/cause/christmasevebuscrash