People in Meza, Arizona today are calling a 9-year-old boy a hero after he saved his baby sister’s life with CPR.

According to Mesa Fire Department spokesman Capt. Forrest Smith, the little girl fell into her grandmother’s swimming pool around 9 a.m. Sunday morning.

Smith said the girl’s mother found her floating in the pool and pulled her out. She was placed on the ground unconscious and not breathing. Her 9-year-old brother, Tristin Saghin started to perform CPR, saying he learned it from watching television.

After a few stressful minutes, Tristin said his 2-year-old sister started to breath again.

Paramedics took the young girl to the hospital. Thanks to Tristin and his heroic actions, she is expected to be fine.