These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Narm: The first time the crew follows Hans into the forest, he suddenly bursts through the woods screaming "TROLL!"
One-Scene Wonder: The Polish contractor hired to place dead bears at the scenes of troll attacks.
Too Dumb to Live: The main characters (Hans excluded) can come off as this. Especially Kalle
The Woobie: Hans, whose life has been ruined by his job and who clearly regrets much of what his job entails. Remember that he mentions a troll massacre he was required to perform in the '70s. God only knows what's happened since.
Iron Woobie: And yet he's still going, still alive, and still doing his job, even when he has to babysit a bunch of college students.
Visual Effects of Awesome: For a low budget movie, the FX for the trolls are astoundingly effective. They look cartoonishly absurd, yet life-like, they provide a convincing illusion that they hold tangible space in reality.
What an Idiot: Kalle really should have let someone know that he was actually a Christian.
Also, Thomas really should have gone to the hospital immediately after being bitten by a troll