Primer

[Zelda]

Synopsis: Two young engineers, Abe (David Sullivan) and Aaron (Shane Carruth), work by day for a large corporation while conducting extracurricular experiments on their own time in a garage. While tweaking their project, they accidentally discover that their invention has some highly unexpected capabilities – the ability to travel through time. Convinced that the device could put their side company on the map, both men use themselves as guinea pigs to test the machine’s capabilities. Taking advantage of this unique opportunity is the first challenge they face; dealing with the consequences is the next.

http://www.imdb.com/title/tt0390384/

It's the kind of movie that you don't understand at first. Before telling my theory about it, I'd like to know if anybody else has seen it.