It happened when the shooting of Rajneeti was in progress. Katrina had to force the whole unit of the film to take rest for a day, as she found the dialogues for that day was too lengthy and tough. She told the filmmaker that she needed an extra day to practice the dialogues and that she would compensate for the day's shooting expenses.
As promised, she brought Rs.15 lakh in cash to the sets of Rajneeti and handed it to Prakash. She got what she asked for by the filmmaker refused to take the cash. Prakash said that he was touched by her professional gesture.
Maybe this is the reason why every filmmaker wants to have a piece of her!