I was just reading about the UFO Windfarm story in the UK and I was thinking perhaps I might make some "UFO sighting" photos for my own amusement.

From a PJ perspective, what would you think would be the elements of a good "UFO sighting" photo?

The objective is for the photo to look convincing at first glance but an obvious fake if subject to the most basic analysis.

Would be a fun project to kill some outdated film.