Unfiltered David Fincher. He's made heavier, weightier films, but nothing that was more a pure exercise in style and control quite like this is. It's tense, thrilling, relentless, straight to the point, yet so detailed. The way perspective is used to insert shots inside of walls or the mechanisms of a torchlight - it's a fascination with precision and functionality that stabs at who Fincher is as a filmmaker at his core.
Tippy, top tier Jodie Foster too.