UNDATED (NBC) -
Carol Flynn saw a mom in need at her local Walmart store in Sioux Falls, South Dakota, so she stepped in to help. She didn't know she was being filmed.
On Sunday night, she saw the young women at the checkout stand remove three of the four large boxes of diapers in her shopping cart and put them aside because the store wouldn’t price-match the items. (The mom had seen the diapers advertised for a lower price at another store, but Walmart would only match the cheaper cost for the first box.)
Flynn, 73, placed the three boxes back in the mom's cart and paid for them.
The mother tried politely to decline the help, but Flynn said she knew she could make the $120 purchase, so she did.
"I said 'yeah, it's okay. It's all right.' I said 'some day you'll do this.' And I said 'paying forward is kind of a neat thing to do and I'm sure you'll pay it forward sometime to somebody else,'" Flynn said.
The girl added that she was grateful for the help.