TRAVELLING MLSs of dog team racing across field. A team is shown approaching camera across snowy field, passes close to camera and disappears into woods. Same team reappears around a bend in the woods and passes very close to camera, runs up over a hillock and disappears again. Another team slides around a corner and all but knocks the camera down as it whizzes past. LS of dog team streaking along the edge of the woods. TRAVELLING SHOTs of dog teams (the numbers on the contestants' backs are not always visible).