Mr Oli "whipped" out his clippers and cut Frank's hair in the middle of Heretaunga St and he watched his whole rapport change instantly.
"Once I was finished he forgot all about wanting food and just walked off down the road with a whole new level of confidence - it was amazing to see."
Last week he cut the hair of a father and son who had both not had a haircut in years.
They were walking by the clock tower when Mr Oli approached them and asked them if they would like a cut.
"Their faces lit up and it was so cool to see, especially because they would not otherwise be able to afford one."
Mr Oli said the driving force behind his passion for barbering was ignited by his friend John Whiunui and younger brother Someh, both of whom have since passed away.
"I remember sitting on the bench in the changing rooms while John cut my hair for the first time. He explained to me what he was doing step by step and once he had finished he handed me the clippers and told me to do his."
Mr Oli said from that day on the pair would have queues of Hastings Boys' High School students waiting for them to cut their hair.
"Barbering at the school became quite a culture and my brother Someh carried that on for us once we left."
He said the school even bought Someh a pair of clippers and he became known as the high school's barber.
When his brother died, Mr Oli was tempted to throw away his clippers but instead found a way to use them as a form of remembrance for his friend and brother.
"After the funeral Someh's friends began to queue in front of me, asking to cut their hair.
"It was here that I realised I could get into a zone where I could use my gift to make others happy."
Mr Oli wanted to inspire others to get up off the couch and help those in the community.
"I just want to motivate people to do the same and encourage them to do better things, like help an elderly person cross the road or help someone carry their bag to their car."
A quote he lived by was to use the gift of barbering not to enhance himself but to share it with others.
"I will continue to use my gift to touch people's lives in different ways whilst always feeling connected to my best friend and little bro - and to me that is very special."