What happened was that I helped an employee at a clothing store because most of the customers left the clothes in the fitting rooms and also would toss them in a pile. I didn't really say anything to the him but I took the clothes in the pile and started to fold them. I felt happy that I was able to make his job easier. I felt kind of excited and glad because now he didn't need to waste a lot of time on folding and sorting out the clothes. He reacted by smiling at me and saying that it was okay and that he could fold the clothes by himself. But I didn't listen to him, and kept on silently folding the clothes. After I was done folding them, I sorted them out into groups (jeans with jeans, shirts with shirts) and just left them on the table. The person smiled at me and said 'thank you' before I left. No, I didn't ask the person to pay it forward, because I forgot that I was doing a project, until afterwards when I realized that I should have told him about my project.
One person can make a big difference in the world. If I start doing something kind, other people will learn from my acts of kindness, and it will rub off on them, like a disease. So that they have no choice to spread it to other people, until the whole world is involved. That's how charities began and that's how foundations began, all by one person trying to make a difference.