['I had a very nice stranger do something for me today at the grocery store.', 'Oh really? What did they do?', 'I was $4 short on my grocery bill and they stepped in and paid for it. I was very thankful!']
Wow! That was really nice of them.
I was in line paying for groceries when I found out I was $4 short. Someone behind me volunteered to pay the rest for me.