The cast and crew had to adapt to a new and unfamiliar environment, which added to the film's sense of chaos and unpredictability. The film's director, Todd Phillips, has said that he encouraged the cast to improvise and try new things, which added to the film's humor and spontaneity.
While the first film was praised for its original narrative structure, the sequel was heavily criticized for essentially being a carbon copy. Critics and audiences noted that the film didn't just use the same formula; it repeated specific beats and gags almost beat-for-beat (e.g., a tiger is replaced by a monkey, a missing tooth is replaced by a facial tattoo). The Hangover Part 2