In the scene where Hermionie,Harry and Ron are going to visit Higrid, they bump into Draco and his friends. After Hermionie punches Draco, Draco and his friends run up the hill with Crab on Draco's right.When Harry and Hermionie go back in time and see themselfs,Hermionie explains how they went back in time.After that,they whatch Hermionie punch Draco and Harry says "Good punch" ,than Hermionie replies"thanks.Draco's coming".If you whatch closly,Crab is on his left running up the hill.