They're on their second set of these, I think. Someone sees someone else do something decent for somebody, and then later they do a similar solid for someone they don't know. It makes for a sort of chain reaction. There's a lot I like about it. I like that it celebrates the basic decency of most people. I like that the things the people do really are ordinary, run of the mill, acts of kindness — like letting someone through, or picking up a dropped letter, or just brightening someone's day with a genuine smile.
I imagine it's too goody for some peoples' taste, but I think it strikes just the right balance of regular looking people doing regular things that are just plain good.