The video shows a man catching a stroller just before it rolls onto a busy street.

Surveillance video captured the moment a Good Samaritan grabbed a stroller containing a baby just as it began to roll down a busy four-lane highway.

The incident occurred Monday in the town of Hesperia, California, when a woman standing near her vehicle fell and lost her grip on the stroller.

The video, which has more than 49 million views, shows the woman struggling to get up after tripping and injuring her knee as the stroller rolled down the road.

A man was then seen running towards the stroller and catching it seconds before it reached the busy driveway. The video went viral, and the post, which was first shared by the Twitter handle @USSGoodGirl, garnered more than 49 million views.

The good Samarcian has been identified as Ron Nessman by NBCLA who had arrived from a job interview.

“I knew I could get it and I got it and I’m thankful for that because I really wouldn’t want to see the end result if I wasn’t there,” he told the network.

He said the baby’s great-aunt sustained knee injuries and was bleeding.

“She did everything she could to get up. Her knees were bleeding when I approached her. She was still in shock and crying,” she said.

Mr. Nessman’s sister, Donna Gunderson, who witnessed the entire ordeal from a nearby patio, said it came to her attention when she heard cries for help.

She said the stroller was heading straight for Bear Valley Road as it was pushed by strong winds blowing across the high desert.

“And I look back and I see a stroller coming down the driveway and my heart drops,” she said.