I can quite often guess the twists to films, but Primer, I had to watch the ending five times or more to figure out what I’d just seen. I think it cost them about $3,000 (it was $7,000)to make., pretty impressive, I’d put it up there with Fight Club or Memento.
One last suggestion.
This was great, a cross between Neo Noir and a 21st re-creation of a Western.