"Flawless" (2007) starts as a nice, somewhat conventional heist drama set in the late 1950s/early 1960s with a dash of feminism. If you can read film language though, the film takes a 90° bend at some point which is masterfully announced with a single 20...30 seconds take that is seemingly irrelevant (but significant because of its length and apparent superfluousness (at first sight)). Michael Caine & Demi Moore are starring, so if you expect nothing (like I did) you will be very pleasantly surprised.

This is the equally masterful opening:

(oh, well, we can't set the time with this blasted forum software, here's the non-embedded link: https://youtu.be/S911KNRPA_4?t=68