While so many people like to label Millenials as selfish or entitled, there are many examples of the younger generation stepping up and doing the right thing.

Joey Prusak, the 19-year-old manager of a Dairy Queen in Hopkins, MN, was working the front counter when a vision-impaired customer dropped a $20 bill while taking out his debit card to pay.

To Prusak’s surprise, the customer behind the blind man calmly picked up the twenty and, after deciding that the man was unaware he had dropped the bill, put it in her wallet. According to Prusak, he asked the woman to return the money, but she refused, saying that it was hers and she had dropped it.

“I told her ‘Ma’am, you can either return the $20 bill or you can leave the store, because I’m not going to serve someone as disrespectful as you,’” After the woman left the store, following a few choice words for Prusak, the teenager took a twenty out of his own wallet and gave it to the man, saying, “Sir, I think you dropped this.”

This act of going above and beyond to do the right thing would have gone unnoticed, but another customer in line witnessed the whole thing and wrote a letter of praise to the Dairy Queen corporate office.

The story went viral after the DQ owner hung the letter in the store where a coworker posted a copy on Facebook. Soon, a number of Dairy Queen customers stopped at the store, praising Prusak, and offering to repay him the $20.