Klassen skal holde skolefest, men skoleinspektøren truer med at aflyse den. Der er nogle, der har smidt stinkbomber i fysiklokalet, og han er sikker på det er én fra klassen.
The class are preparing a big party. Someone has made a huge mess in the science classroom, and the headmaster is sure he it's someone from the class. The party is put on hold until the mess has been cleaned up.