“Primer” opens with four wizkid-inventors discussing all kinds of physical theories that I cannot follow. It does not help that the white subtitles are hard to see against the often very light background. Two of the wizkids are onto something big, discussing it in detail and I am totally lost. In the second half it becomes relatively clear what it is that the two men have created and then the film becomes vague in the sense that I like better. It is no longer clear what is what, who is who and when is when. “Primer” is a very complex film in different ways and I definitely need to see it a few times more before things will start to make sense. That is a good thing, since most films are ‘over with’ when I saw them ones, but the impression of the first watch did not leave satisfaction. This film is “a challenge” like people seem to love to put it nowadays.