The team find themselves trapped in a room with a door locked by a four-digit code, and have to play this game to discover the code and get out. The players take turns answering trivia questions, with a correct answer letting them take their chances with the row of numbered cubicles on the back wall of the room. They have to choose one and step inside - four of them will let them out clean, but the others will gunge them. Once the four correct booths have been found through a messy process of trial and error, the code can be worked out from the numbers of the cubicles.