My friend was standing in line to buy some medicine she needed, but when the cashier told her the price, my friend was surprised to find that she was a few dollars short. She asked if she could leave and come back for the medicine since she did have more money at home. Before the cashier could reply, however, the person waiting behind my friend offered to pay for her.
My friend was grateful and accepted the offer. It was not until after the transaction was completed and my friend found out that the customer paid the full price of the medicine and not just the few dollars she was missing that my friend became truly shocked at this person's kindness. When my friend confessed to me that she wanted to pay this person back but did not know who it was, I was glad that I had the opportunity to pay the kindness forward instead!