It is April Fool's Day. Oliver, who usually runs the dough machine, quit the day before and there is no one to run it. Charlie's co-workers decide that they will trick Charlie into running the dough machine. They hope to make an April Fool out of him. To their surprise, he does an outstanding job of operating the machine. His results surpass those of Oliver, who went to baking school two years to learn how to fill the position.
The owner and supervisor witness Charlie's skill and decide to change his job from general flunky to dough machine operator. When Charlie says that he prefers his old job, they explain that he must grow with his new knowledge and skills. They tell him that he must advance. This is a new concept for Charlie. He wants to know what "advance" means.