During flight inspection of the Brisbane 19 ILS last week the calibration aircraft had to complete an approach and then fly at 50' along the centerline to the opposite threshold. All of the traffic was opposite direction on 01. Just after the calibration aircraft was cleared for the run a Qantas 767 called ready.
Tower: "QF767 hold short 01, traffic is calibration aircraft, king air, overflying runway at 50 feet, 19 direction"
QF767: "Wicked"