Mr Mazharuddin said one of his friends had died at the scene and another was bleeding heavily as he tried to contact emergency services.
The 48-year-old is responsible for singlehandedly stopping the Christchurch shooter from continuing the massacre at the Linwood mosque, the second mosque he targeted during Friday's mass shootings.
But Aziz, whose four sons and dozens of others remained in the mosque while he faced off with the gunman, said he thinks it's what anyone would have done.
The gunman is believed to have killed 41 people at the Al Noor mosque before driving about three miles across town and attacking the Linwood mosque, where he killed seven more people. One person died later in a hospital.
Latef Alabi, the Linwood mosque's acting imam, said the death toll would have been far higher at the Linwood mosque if it wasn't for Aziz.
Alabi said he heard a voice outside the mosque at about 1:55 pm local time and stopped the prayer he was leading to peak outside the window.
He saw a man wearing black military-style gear and a helmet holding a large gun, and assumed it was a police officer.
He yelled at the congregation of more than 80 people to get down but Aziz did not hesitate to go out and confront the gunman, said Alabi. Aziz says this then prompted the suspect to drive off, prompting him to give chase.
"Then this brother came over".
Aziz said as he ran outside screaming, he was hoping to distract the attacker. He said the suspect ran to his auto and got in, which is when he threw a gun at the vehicle.
The gunman returned and fired.
Then Mr Aziz spotted a gun that had been discarded by the attacker and picked it up, pointed it and squeezed the trigger.
The gunman began shooting at Mr Aziz, but he managed to dodge between cars parked outside the mosque.
"It bust his window and that way he got shocked", he explained, adding that the terrorist "swore at me and took off" before he chased him down the street.
He said he chased the vehicle down the street to a red light, before it performed a U-turn and sped away.
Police caught the man a few minutes later.
Born in Kabul, Afghanistan, Aziz left his homeland as a refugee when he was a boy and lived 25 years in Australia before moving to New Zealand a couple of years ago.
"If that hadn't happened, many more would have died and I wouldn't be here now", he said. And, he always thought, a peaceful one as well.