Originally Posted by NSMaster56
Other 'indie' (legit 'indie', not 'Hollywood Indie') movies that are interesting and worth a view (although not the mind f*ck of Primer): Cube and Exam.
I've never seen Primer, but it's interesting you bring up Cube. I just saw Fermat's Room which reminded me of Cube.
If you love the excitement of math combined with a shrinking room you'll love Fermat's Room. It's in Spanish though, so you'll have to be able to read subtitles quickly.