Over $70,000 raised for homeless man who helped take down Melbourne knife terrorist

The man who has been hailed as a hero for ramming the knife-wielding Bourke Street attacker with a supermarket trolley has described how he acted instinctively.

Dubbed 'Trolley Man" by social media users, Michael Rogers is seen in footage coming to the aid of police officers as Hassan Khalif Shire Ali lunged at them with a knife on Bourke Street on Friday afternoon.

Mr Rogers, who is understood to be homeless, has been praised online with some calling for him to receive a bravery medal.

By Sunday evening, more than $92,000 had been raised for the 46-year-old through a GoFundMe page.

By noon on Sunday almost $20,000 had been donated, and by 11pm the fund had soared past $90,000.

"We've since learned that Trolley man is homeless and we believe his efforts deserve a reward that can really help him out," the crowdfunding page says.

"He's a hero in our eyes. He risked his own life that day for nothing in return and you can't put a price on that."

"We've found him! We had a long chat on the phone today and we're even more proud of him. Our hero is humble as can be and had no idea about this fundraiser. We'll be catching up tomorrow to hand over his donations. He is amazing," they said.

Seven News reporter Robert Ovadia said after the interview was shot, a police officer shook Mr Rogers' hand and said thank you.

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