Footage of unexplained lights in the skies over Adelaide captured on December 7 has sparked debate between thousands of believers and sceptics on YouTube.
The footage, which runs for 76 minutes, has even prompted one cyber expert to proclaim governments are withholding secret intelligence that proves humans are not alone in the universe and D-day is tomorrow.
"I know what I saw and it was very real. This is no joke guys!" a comment on the YouTube footage says.
"I've seen a page saying governments have until December 31 to tell the world, otherwise star nations will initiate a series of open, public, dramatically obvious demonstrations of presence, such that the government will be compelled to publicly acknowledge star visitors."
The video has been viewed more than 55,000 times.
On non-believer offered an explanation to the December 7 UFO sighting, posted by FluffyJet Productions.
The non-believer posted a video last week of a Pulselite unit being used on a plane and said such warning devices are now used on some planes landing in Adelaide to avoid bird strikes.
Adelaide Airport general manager of corporate affairs John McArdle said Pulselite units were used on aircraft flying over Adelaide.
See the Video here - http://www.adelaidenow.com.au/ipad/ufo-captured-on-camera/story-fn6bqpju-1226105028091#