A 12-year-old girl recently used CPR to revive her 2-year-old brother after he was discovered unresponsive in a septic tank in Edgewood, Washington.

The children’s mother, Marcia Hess, was the one who initially pulled the boy, Thorin, out of the tank. However, she got stuck and was unable to get out until the local fire department cut her out of the tank later.

According to KOMO News, Thorin had fallen into the septic right in front of his sister, Madi. “He’s running toward the green thing and I’m like ‘Thorin, no.’ And I see him step onto it, and in a flash, he goes straight down and then I start screaming.”

At that point, Marcia ran out of the house and saw her unresponsive son submerged in wastewater. “I could see him dying, and so I just called out to God and just prayed get me down there,” she tells KOMO News.

She lowered herself into the tank and passed Thorin out to Madi. Helpless inside the septic tank, she begged Madi to save Thorin.

Dispatchers instructed Madi how to perform CPR on her brother, and Thorin was conscious when emergency medical personnel arrived on scene. East Pierce Fire Chief Bud Backer tells The News Tribune that Madi kept control and followed directions perfectly to save her brother’s life. “The fact that his 12-year-old sister was so dialed in, they were saying, ‘Chief, you need to keep track of her. Ten years from now, you need to give her a job.”

Thorin was treated for swallowing wastewater, while Marcia still has some bruises from wriggling into the tank. The family had a message for the public, too: Check your septic tank covers and make sure they’re secured and in good condition. The Hess family now has a new fortified cover over their tank.