In the scene when Harry, Ron and Hermionie are going to visit Higrid they bump into Draco and his friends. After Hermionie punches Draco, Draco and his friends start running up the hill with Crabbe on Draco's right. When Harry and Hermionie go back in time and see themselfs, Hermionie explains how they got back in time. After that, Hermionie sees herself punch Draco and Harry says "Good punch" then Hermionie replies " Thanks. Draco's coming". As Draco and his friends come running up the hill, look carfully and Crabbe is on draco's left.