Many training programs have pre-defined criteria for completion, such as completing so many college classes, or completing various tests with certain minimum scores, and so on. But sometimes, the only way to show that the apprentice is ready to leave and go forth into the world is for him to go up against the Old Master and show that he is now capable of besting him. This could take several forms. It could be a duel to the death, or simply a sparring match. Sometimes it might take the form of When You Snatch the Pebble, or simply a competitive display of craftsmanship. Often serves as the culmination of an extensive Training from Hell. --- Examples include: Film:
Hello, Unknown Troper. You'll need to get known to lend a hand here.