What's Your Kindness Story?

I received a kindness back from many I've done once. It was school Supply time at a store & I picked out a notebook I liked thst I thought was only $1. When I got to the register, I found out it was $2. I had only my dollar. I saw the line behind me & quickly cancelled the transaction. I then had to use the bathroom. When I came out, a lady that had been in line after me called to me. She gave me the notebook! I didn't have to pay her back-she wouldn't take my dollar! Her only request was to pay it forward. I have many times since then.