Primer (2004) cost only 7 grand to make, but is one of the best suspense/sci-fi movies I've ever seen. It's also a mind-bending experience like "Inception" and "Memento" and could require additional viewings or a rush to the Internet to figure out everything that's going on here. But it's a wonderful, trippy experience. (It's also available, either in parts or as a whole, on YouTube.)
Directed by Shane Carruth. With Shane Carruth, David Sullivan, Casey Gooden, Anand Upadhyaya. Four friends/fledgling entrepreneurs, knowing that there's something bigger and more innovative than the different error-checking devices they've built, wrestle over their new invention.
Primer, which electrified audiences at the 2004 Sundance Film Festival and won the Grand Jury Prize, is the stylish feature film debut from former engineer Shane Carruth. Description from movieweb.com. I searched for this on bing.com/images