A random act of kindness at a Sioux Falls Walmart went viral after cell phone video captured a woman paying for the diapers of the young mother ahead of her in line.

73-year-old Carol Flynn had no idea anyone was aware of what was going on, let alone filming the pay-it-forward moment

The prideful young woman tried to deter Flynn from buying the diapers for her four-month-old son, but as a former state director for the March of Dimes, she insisted.

Jason Yoshino, the man who caught the entire moment on his cell phone, says he was just browsing Facebook while waiting in line when he noticed what was going on. He says the young mother was more stunned than anything and kept thanking the older woman.

He was right. She was stunned as she describes her experience with gratitude.

I couldn't believe it. I was shocked. I kept saying thank you and God bless you...Then I walked out in the parking lot and started crying. It just hit me. It was an awesome statement of what God's love does.

Yoshino posted the video to his Facebook wall, and from there it just blew up. Lynn says she never wanted publicity—but her phone continues to ring off the hook as a result of her newfound popularity, which she calls "embarrassing."

Someone needs to tell her that there is nothing embarrassing about restoring our faith in humanity.