But that was not his greatest attempt to transform into Arthur Fleck. To get the most true feelings, Joaquin chose acting method “method acting”, ie acting mind. He must really understand and become a character not only when acting but also during the production of the movie. Joaquin also revealed that he almost went crazy while preparing to film. The pain on Arthur Fleck’s face and sick smile made the audience silent. The result was Joaquin’s own creation when learning about Joker.