Paul O'Shaughnessy and his brother Luke, from Manchester, were among the heroes who restrained the man, according to the Guardian, which reported that he shouted "extremist slogans".
The man fell to the ground when the auto moved and he was confronted by a person holding a chair, the video showed.
One other woman was injured in the earlier incident.
Police said they had received reports of the man's remarks, but had not yet determined a motive.
They eventually knocked him down with a cafe chair, and then used a milk crate to hold his head to the footpath as first firefighters then police arrived to restrain him.
A video shows the man jumping onto a vehicle roof in the middle of the street before being restrained by members of the public with milk crates and chairs.
A 21-year-old man named Mert Ney went on a stabbing rampage in Sidney, slitting one woman's throat and stabbing another in the back.
CCTV showed Nay being confronted by a silver-haired man brandishing a chair picked up from a café. It does include lots of obscene language. "No idea how many people were hurt, hopefully no one too bad!"
Some members of the public abuse the man and attempt to assault him, while others urge people to "wait for the cops".
The Marayong man was arrested this afternoon after he allegedly stabbed a 41-year-old at the Hotel CBD about 2pm and then tried to stab countless others as he wandered the streets. They were significantly courageous people ...
"To approach a person with a mindset of obviously what this person did, with clear evidence of a stabbing previously, these people are heroes". "And I want to acknowledge that".
Police said a second woman in hospital was not in a life-threatening condition, while a third woman was said to have a minor injury to her hand.
The body of a woman found dead in a nearby apartment is thought to be linked to the street attack.
NSW Police Minister David Elliott said "the city is safe".
"We've opened the window and seen the guy wielding a knife and jumping on the bonnet" of a nearby auto, Paul O'Shaughnessy, a former professional footballer, told AFP.
The two brothers, Paul and Luke O'Shaughnessy from the United Kingdom, said they felt immediately that they needed to help.
"So insane! A random dude just started stabbing people in the city right outside where we were having lunch", JackHuddo said on Twitter.
Uber driver Leon Baghani said the assailant, clutching a knife, jumped on the hood and then the roof of his Mercedes as he was driving an elderly couple on the street where the violence occurred. The man driving that auto, an Uber driver, later told the Morning Herald he hit the gas to get the suspect off his roof.
He said that the man "was shouting radical things" but that he did not want to repeat them.
"I'm a religious guy myself, I'm Christian, I'm proud of it, but it doesn't define me, everyone has a different faith, but that is radicalism, that's not faith". "They were significantly courageous people", he said.
Denise Austin's daughter, Katie Austin, wrote "Yassss" while others lent their applause and support to Olivia Jade with emojis. Just last week, several outlets posted a report that the two daughters had been kicked out of their sorority at USC.
But he admitted: "It's different playing matches". "My team felt this was the time, that's why I'm giving it a go". Murray began playing doubles at Queen's Club in June, winning that grass court title with Feliciano Lopez .
The Cowboys are straddled with the likelihood that they might have to overpay a quarterback who will never be at that level. An already uneasy training camp for the Dallas Cowboys just got a little more problematic.
Vehicle sales across categories registered a decline of 18.71% to 18,25,148 units from 22,45,223 units in July 2018, it added. In July 2019 too, auto sales are 35.95 percent down YoY, which is not far from that dismal figure almost two decades ago.
The video is appropriately titled " Jack Gray " and shows the meet up between Tenacious D and The Raconteurs frontman. Speaking to camera the School of Rock star said: "So Jack White just gave us the tour of the Third Man headquarters.
Ses proches pensaient qu'elle avait été enlevée et avaient déclaré à l'AFP qu'elle n'était "absolument pas" habituée à fuguer . Elles ont également mis en place un numéro de téléphone à destination du public afin de recueillir des informations.
I [wasn't] going to grab his hand and flee the scene and move zip codes, [then] he has to move high schools, and stuff like that. She also revealed that she "knew a lot of things for years", but had one very good reason for keeping quiet about it all.
Ivan Perisic targeted Champions League glory with Bayern Munich this morning after completing a loan move from Inter. Yet several former Bayern players have insisted that Perisic would be more than just a plan B.
The £10,000 reward - 50,000 in local Malaysian Ringgit currency - was donated by an anonymous businessman based in Belfast. Investigations are underway to confirm identity and cause of death", it said in a statement on Tuesday.
Quant à la jeune femme, elle avait envie de participer au jeu d'aventure de la Six pour "prouver" des choses à son homme. Certains abonnés avaient déjà remarqué le fait que leurs photos en amoureux avaient été retirées des réseaux sociaux.