Two teenagers filmed trying to stop the accused Bourke Street mall attacker as he drove erratically outside Flinders Street station have said they wished they did more.
Cousins Isaac Tupou, 17, and Tevita Mahina, 17, attempted to the halt the driver with a baseball bat before the rampage was carried out that killed at least five people and injured dozens more.
The Year 12 students were at Federation Square for a church youth group event on Friday when they saw a man driving in circles at the intersection of Swanston and Flinders Sts.
“We saw him doing doughnuts and screaming to the crowd and in that moment, I knew he was going to inflict pain or was going to harm someone,” Isaac told Nine News.
Isaac said he and his cousin decided to take action "because no one was doing anything" and, armed with a baseball bat they'd been playing with, raced towards the driver.
"The car came at us then I stepped to the side and swung the bat," Tevita told Nine News.
"Then he came back and chased us off."