“Primer is a 2004 American science fiction drama film about the accidental discovery of a means of time travel. The film was written, directed, and produced by Shane Carruth. Primer is of note for its extremely low budget (completed for $7,000), experimental plot structure, philosophical implications, and complex technical dialogue, which Carruth, a college graduate with a degree in mathematics and a former engineer, chose not to simplify for the sake of the audience. The film collected the Grand Jury Prize at the 2004 Sundance Film Festival, before securing a limited release in the United States, and has since gained a cult following.” – Wikipedia.