So... I just watched Primer. Has anyone else seen this? What the fuck did I just subject myself to? Ugh, my brain hurts.

I first heard of primer from this xkcd, and thought, hey, I like time travel movies and this one looks really complicated. That might be fun. I then forgot about it for a while, and was recently reminded, and finally got the movie and watched it.

What just happened?

I have now done some googling and reading and still only just barely have a grasp of what happened. Sparknotes helped me figure out a few details, but I'm definitely still missing a lot. io9 posted a really extensive set of timelines but I have not spent the time to read it, because my brain is starting to feel like mush.

Who else has seen this movie? Did you feel like this?