There's a movie being screened in Sydney next week that is sure to polarise its audience. It's called Australien Skies.

It's a documentary about some of the unexplained stuff seen by people who call themselves skywatchers. The timing is good. Earlier this month Russian billionaire Yuri Milner announced he would spend at least $US100 million ($138m) to see if there really is anything "out there". Australia will contribute to the effort using the CSIRO's Parkes radio telescope.

There is an intriguing story in the documentary from Kiama told by Liam Freaney. He's a builder, married with two kids and is a pretty regular kind of guy who, two years ago, had no particular interest in UFOs or staring up at the heavens.

But in March 2013, he and a workmate saw in the daylight, bright stars gathering around a ball of white light which disappeared and reappeared before being approached by what he describes as a F18 Super Hornet. Then everything vanished.