What does Katniss do before the judges? Why might this act be considered controversial? chapter 7

Katniss is called last and immediately notices that the Gamemakers, who have been there all day and endured 23 previous displays, are drunk and distracted. She has some trouble with the more professional bows available, but eventually begins to display her aptitude at archery. Their indifference to her work, manifested in their attention to a newly-arrived roasted pig, angers her and she fires an arrow directly to their balcony, skewering the apple in the pig's mouth with her arrow. She knows it was a mistake and leaves immediately. Nobody has ever shot at the sponsors and dignitaries before. This certainly gets Katniss noticed!