A total of 630 effect shots equal to 35 minutes of the movie makes it the biggest special effects movie in Scandinavian history. It has more special effects than Jurassic Park (1993).
Towards the end of the movie the main characters are in a small aircraft with the code "OY - 1138" written on the side. OY (Oscar Yankee) is the code used to identify all aircrafts from Denmark. 1138 is an homage to George Lucas' movie debut THX 1138 (1971).