One Man Band story tell us that don't judge a book by its cover. Even the girl is small, she can play well the violin, better than the musician. When she wanted to start play the violin, the both musician didn't trust her talent. But, after she started played the violin both of them was amazed with her. The proof that showed she can played very well the violin when she got a bag of money.
The revenge towards the both man made her threw the money into the fountain rather than give the money to the both man. Because of the both musician that wanted the coin that belong to the girl, they fight and cause the money to drop into the drain. So, when she got the bag of money, she didn't gave the money to the both musician but threw the money into the top of the fountain.