When the Chofetz Chayim was a young boy, a group of mischievous children in his neighborhood would fill up the water-carrier’s pails with water and leave them outside overnight to freeze.  When the unfortunate man awoke in the morning, he had the difficult task of removing the frozen ice from the pails.  When young Yisroel Meir discovered the prank, he would go late at night to the well to empty the pails, thus saving the water-carrier much distress. ~ R’ Shmuel Pliskin in Der Chofetz Chayim