Gruesome School Trip (Dutch: De Griezelbus) is a 2005 Dutch horror family film written and directed by Pieter Kuijpers and co-written and produced by Burny Bos, based on the Dutch novel series De Griezelbus by Paul van Loon.

[2] The film received mixed reviews and grossed over $1 million at the box office.

He believes that if he loses self-control by becoming too excited or getting into a fight, he will turn into a werewolf.

After a particularly humiliating incident at school where the bully Gino grabs his love poem to Lislore and tears it to pieces, Onnoval writes a horror story where he takes revenge on his classmates.

If Onnoval does not rewrite the story immediately, the planned school trip to the Horror Park will end in disaster.