It was the night of the full moon before Sirius got the opportunity he was looking for. He spotted Harry and his two friends, and he knew that Peter was with Ron Weasley in his guise as Wormtail. He followed the three from Hagrid' hut, as Padfoot, awaiting his opportunity. And then he flew at the frightened redhead, dragging him and the rat into the Whomping Willow. Now he would have his revenge!