Scared the sh*t out me the first time saw it happen, where you go to the left lane to turn right at junctions, from Victoria Road rules
Hook turns are required when turning right at some intersections in Melbourne which have tram lines running along them. Their purpose is to improve traffic flow by removing turning traffic from the right lane where there is no space for a dedicated turning lane. For areas where trams share the right lane of the road, the use of hook turns also ensures trams going straight ahead are not held up by right turning vehicles.