The most difficult scene to film was Chi-chi's fight scene with her evil clone (Mai impersonating Chi-chi), as it required Jamie Chung to not only train with a stunt woman who's face would be digitally replaced with Chung's, but to also be able to play both characters at the same time when the scene called for it (such as when the shots cut back and forth between them both). According to the filmmakers, the real Chi-chi fights very rough and tomboyish, using a lot of kicks, while Mai (impersonating Chi-chi) fights more elegantly and is light on her feet. Jamie Chung ended up receiving several bruises from this fight scene but she was proud of her work in the end.