A video of a teacher’s assistant saving a boy from choking on a school bus went viral on Friday.

The footage shows Ginger Maxville, a teacher’s assistant from Oklahoma, using the Heimlich maneuver to help a 4-year-old boy who was choking on a coin he swallowed, Tulsa’s KTUL reported.

Maxville told KTUL she thought the boy was misbehaving and not sitting down while riding on the bus she was driving, until his sister told her he had swallowed a coin.

“Oh, my Lord! Are you serious?” Maxville exclaimed in the video before jumping out of the driver’s seat to help the child.

“I made sure the bus was secure went back and grabbed the student. He was just red and gasping for air,” Maxville said, according to KTUL, adding that it was the first time she had used her CPR training in 17 years.

“I feel like I don’t deserve a lot of credit,” Macville said to KTUL. “It was just God working through me. But I am just glad we got it done.”

The video was posted to Reddit on Friday, where users praised Maxville calm and quick-thinking.

“I hope I’m that calm if a situation like that happens in front of me,” Reddit user Staggmpg wrote.

“What a boss, she did that so nonchalantly,” said Languagebutton, another Reddit user.

You can watch the video of the dramatic rescue below: