I've always wanted to see a film that had a "fingerprint being sprayed with chemicals on wall POV" shot
first watch was INSANE.
I started to dig into some analysis/explanation, but quickly stopped, lest I spoil any repeat viewings. as a mathematician/programmer, that feeling of loving a puzzle so much that you don't want to spoil it is second to none. (As it turns out, Carruth got his mathematics degree and worked as a programmer before making this film).