When a Georgia mother's 2-month-old baby suddenly stopped breathing, there was only one thing she could think to do: Scream at the top of her lungs.

"I had him in my arms and still screaming over and over," recalled Susanna Rohm of Marietta. "Then I ran outside. I saw two boys playing across the street and I yelled, 'go ask your parents to call 911.'"

Ethan Wilson, 10, and Rocky Hurt, 9, called 911 themselves, and then Rocky did Rohm one better: He taught her how to perform CPR.

Noticing that Rohm was attempting to revive her child incorrectly, he immediately stepped in and guided her through the procedure.

"I told her to push on the baby's chest five to 10 times with only two fingers, tilt back the baby's head, plug the baby's nose and breathe into the baby's mouth," Rocky instructed Rohm. "He said it so confidently that I just listened to him right away," Rohm told 11Alive.

Seconds later, baby Isaiah began screaming. "I told her that's a good sign because the baby's breathing," Rocky said.

Paramedics soon arrive and rushed the infant to a nearby hospital where he was diagnosed with sleep apnea.

Asked where they learned CPR, Rocky and Ethan said they memorized the steps illustrated on a cafeteria poster at their elementary school.

"We just wanted to know just in case it happened," Ethan told NBC News, "but we never knew that we'd have to do that."

[screengrab via MyFoxAtlanta, video via Today]