There's been an Army Carribou operating out of a small council strip in the very south of Victoria last week. It came in for a look during daylight, then returned that night with no radio, no lights and no PAL activated and conducted around a dozen circuits in complete darkness.
Apparently a dozen local residents rang the local constabulary with reports of Korea taking over and other variants.
They must have been testing their night vision capabilities or something. They were operating off a medium length grass strip.
Perhaps this is the "Cessna" that you speak of?