In her final "selfless act", Mijin Shin saved the life of her 11-month-old daughter by throwing her out of the way of a bus.
A witness broke down at an inquest yesterday while recounting how Ms Shin threw baby Meera just before she died under the bus's wheels in Sydney's north in May 2012.
"I picked up the baby and the baby started screaming," Sam Agostino said.
"I thought that was the best thing because obviously the baby was alive."
Ms Shin's other daughter, 11-year-old Kelly, who was returning from a school camp, was on the bus that struck her mother in Beecroft.
The Glebe Coroner's Court has heard that Ms Shin, 38, was distracted by waving to her daughter on the bus when she crossed the road.
Mr Agostino was waiting at the traffic lights next to the vehicle.
He said he saw the bus turn left and noticed a woman walking across the road, then the bus clipped the woman and pulled her under it.
"I saw something fling out of her hands but I didn't think anything of it at that point," Mr Agostino said.
He said he started running after the bus, calling for it to stop.
"I started bashing on his window and he came to a stop," he said.
"I turned back and I looked at her - it was pretty bad."
Senior Constable Wayne Stephenson said in his opinion the pedestrian crossing light was green but Ms Shin was in a blind spot.
The location of the fatal crash was a known black spot and had been the scene of serious injury crashes in the past, the inquest heard.
Bus driver Sydney Wickett is adamant the blind spot did not block his view of Ms Shin.
"It's only a blind spot for other vehicles, for pedestrians ... well it may ... but I don't think so," he said.
Mr Wickett believes Ms Shin may have run towards the bus while trying to get Kelly's attention when she tripped, hit the side of the bus and went under the wheel.
The inquest continues.
