I photo'd ZK-HLN during the afternoon of the SAANZ flyin.
Then just as I was about to leave, 2 cars raced up to the carpark - driven by the paramedic and the pilot. There was also a TV cameraman, I guess for the TV show Rescue 1. A very quick start and after around 5 minutes liftoff.
Look out for it on TVNZ's Rescue 1 programme.