history: A tree blew over in my yard after a big windstorm.  While I was cleaning things up, my neighbor came over unannounced with his chainsaw and started to cut up the tree.  Then he helped me rake up the rest of the debris.  It was a very generous gesture. My neighbor really helped me out recently after a big windstorm.
current: That was very kind of them. Did they charge you for their labor?
next: No, they generously helped me clean up my yard and cut up a tree with their chainsaw, and they asked for nothing in return.