A hook turn is a right hand turn you make from the left hand lane, something unique to Melbourne.
In central Melbourne in order to maintain tram traffic flow turning right at several major intersections is completed from the left hand lane using the following steps.
Approach and enter the intersection from the far left hand lane with your right indicator on
Move forward to the other side of the intersection, keeping as near as possible to the left of the intersection and clear of any pedestrian crossings
Remain stationary until the traffic lights on the road you are turning into have turned green and then turn right into that road