Dry humor can take time to get used to. This is super-dry. It's a bit of a no-complain, no-explain world, because you're trying to say as little as humanly possible. In this world you also make quick decisions, because thinking might involve some type of inner dialogue, and we don't do that here.
Matti Pelonpaa is such a badass, though I question the decision to have him bend down for the money and take his eyes off those guys. Nobody in that situation would do that, especially not a convict. Still, an overall great film, and my favorite of the "Proletarian Trilogy."