When Katie Kanefke learned Walmart would only match the price of one of the four 148-count diaper boxes she brought to checkout, she decided to set aside the additional Pampers and only go with one box.

But then a stranger stepped in at the Sioux Falls, South Dakota, store and committed a random act of kindness that brought tears to the stay-at-home mom’s eyes.

Carol Flynn, a 73-year-old retired March of Dimes director for the state, bought the other three boxes, totaling $120 worth of diapers. Jason Yoshino, who was in line behind these women, caught the whole thing on camera.

Carol Flynn buys three additional boxes of diapers after a mother set all but one aside when she learned the store would only price match one. (Image source: Jason Yoshino/Facebook)

Carol Flynn buys three additional boxes of diapers after a mother set all but one aside when she learned the store would only price match one. (Image source: Jason Yoshino/Facebook)

The man who is in the wedding industry posted the video of the gesture on Facebook Sunday.

“Tonight the wife and I ran to Walmart real quick to grab a few things. We witnessed something and I got it all on video,” Yoshino wrote.

Before he started recording, Yoshino explained that the older woman, who was later identified as Flynn, left the line at first because the price check on the diapers was taking some time.

Then, “out of no where, the older lady comes back through and sees the girl was only buying 1 of the 4 cases of diapers,” Yoshino wrote. “The older gal grabs all the cases and proceeds to put them in the cart as you can see in the video that where it starts. She insisted on paying for them for the girl. You can here some of their conversation. At the end the girl thanks her. The older gal tells her to pay it forward someday.”

Watch Yoshino’s footage (courtesy of the Argus Leader):

“My wife and I were speechless at this warm hearted and kind act of generosity. There are some amazing people in this world. What a way to end such a beautiful day to witness such an amazing act of kindness. To whomever the older lady that helped this young girl, I hope this finds you. Thank you and God bless you,” Yoshino wrote.

It did more than find her. Not only has the video been shared nearly 5,000 times and liked nearly 18,000 times on Facebook, but it was picked up by local and national news sources.

“I couldn’t believe it. I was shocked,” Kanefke told the Argus Leader. “I kept saying ‘thank you’ and ‘God bless you.’”

She explained that while she stays at home with her 4-month-old, her husband’s single income requires that they stick to a budget, which is why she was hoping for a price match on all four boxes of diapers, not just one.

But Flynn has been there before.

“It looks to me like you had four boxes of Pampers and you’re only buying one,” Flynn recalled of what she said to Kanefke to KSFY-TV. “So I said, ‘Do you have children?’ ‘Yes, I have a little boy who is 4 months old and he uses a lot of diapers.’ And I said, ‘I think you need the other three boxes then.’”

As Kanefke walked out to the parking lot, she said that’s when what just happened hit her and she started crying.

“It was an awesome statement of what God’s love does,” Kanefke told the Argus Leader.

Flynn said she told Kanefke she knew that someday she too would pay it forward.

“I said, ‘Someday, you’ll do this.’ And I said, ‘Paying it forward is kind of a neat thing to do and I’m sure sometime you’ll pay it forward to somebody else,’” Flynn told KSFY.