It is unclear why when they are extremely cold, including when they've been in the icy water and are shivering, they do not utilize the hoods of their jackets.
In the 26th minute the laser dot appears of them, but one never sees the point of origin of the laser.
In the 63rd minute, when watching with English audio, the emergency operator responds with "911 what's your emergency". However, the emergency number in Sweden is 112.
This was probably done on purpose. It's pretty normal to not translate local things and cultural references literally. English speaking audiences might not have understood what 112 is.
In the 16th minute refueling at the gas station, David starts his car up and runs head first into a pickup truck facing them, which he saw, yet made no effort to navigate around it.