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.
YMMV: Blood Simple
Nightmare Fuel: Imagine yourself regaining consciousness after being shot, to find yourself being buried alive.
In several other ways, too, well described by Roger Ebert:
It keys into three common nightmares: (1) You clean and clean but there's still blood all over the place; (2) You know you have committed a murder, but you are not sure quite how or why; (3) You know you have forgotten a small detail that will eventually get you into a lot of trouble.
The scene in which Visser has to pull the knife from his hand also counts, if only because it seems to take forever to remove it.