A MUM threw herself in front of her car as a “human speed bump” to stop it from rolling into traffic with her two-year-old twin daughters inside.

Mindy Tran suffered a crushed left knee and dislocated hip after jumping in front of her sedan after it began to roll towards a busy street.

Ms Tran thought her car was in park in her garage when she stepped away to lock her front door – but it then began rolling down her driveway with her two-year-old twins buckled up in back.

“I was like ‘What is going on?’,” Ms Tran told WCBV-TV.

“And I see my daughter sitting there in the backseat and of course my first instinct is, ‘I have to push the car back into the driveway,” she said.

“I had to use myself as a speed bump to slow it down enough for one of my neighbours to get in and completely stop the car,” she said.

Ms Tran jumped in front of the car until a neighbour ran over and pulled the hand brake. Firefighters later arrived and lifted the car off Ms Tran, who suffered a crushed left knee and dislocated hip.

The brave mum has since has multiple surgeries on her injured leg. She remains in a wheelchair and is undergoing rehab to learn to walk again.

Despite her injuries, Ms Tran says maternal instincts kicked in when she saw her daughters heading toward danger and she would do anything to save her girls.

“My daughters are my everything…and I don’t want to see them in the hospital, and I knew at that time it was either mine or theirs,” she said.

“It was all for my kids. I’m just glad my kids are fine,” said Ms Tran.