After dropping the skull off the back of the pickup truck with the tailgate in down position in the next scene the tailgate has been shut....
In the beginning of the film one of the paleontologists is shown digging to find dinosaur fossils but what she is digging in is a peat bog. Peat can be several metres thick and is soaked in water, any dig without excavating equipment will immediately fill with water. Fossils, if any, would be in the rock below. Therefore, this is a pointless endeavour, without excavating equipment and cofferdams.
The prime minister formally declares a state of emergency in her address to the nation. Norway doesn't have a law that provides for this, however. There is no state of emergency or martial law in Norwegian law.
Norway has used the metric system since 1875 and in the original Norwegian dialogue, Nora Tidemann describes the troll's height as "forty or fifty meters".
It is only in the English dub that she says it is "over a hundred and fifty feet tall", likely to appeal to the US market.
In any case, whatever measuring system a country's government claim to have adapted, all individuals are free to use any system that they are conversant and comfortable with. Likewise, even countries using the metric system, land, property and houses are still measured and mentioned in feet area, as that practice has not changed and people sometimes understand feet area better than square metres for a land or plot. An individual's use of any measuring system does not contradict the measuring system their government is supposed to have adapted.
In the movie they mention that the national railway Nordlandsbanen (Trondheim - Bodø) was only continued to Bodø during WW2, hinting to trolls obstructing the construction work further north. However, the railway was only completed to Dunderland, 200 km south of Bodø, in may 1945. The railway was continued to Bodø many years later, in 1962.
The Troll King had come out after a long-long time, so he must have been very hungry and the first thing he would be looking for is to get food. All the prime minister's top advisers and scientists should also have realized it and should have made efforts to provide him food to pacify him and try to make a bonding. But there is not a single mention of food to be provided to the Troll King. That establishes that everyone including Dr. Tidemann and Holm has actually decided to kill him.
Dr. Tidemann, and maybe most of the actors, address and treat the prime minister without due respect that a civilized person of any country would normally do.