 He showed Groening and Jean his Adult Swim shorts and Groening responded by giving him free hands to do the 35 @-@ second @-@ long segment . Groening told him to break all The Simpsons rules , but Kricfalusi explains that he " tried not to break any rules in the characters ’ personalities , just in the execution of the visuals . I didn ’ t follow any models — not even my own " . The more rules he broke , the more pleased Groening and Jean were with the result . Contrary to Banksy , who lives a life in secrecy , Kricfalusi was involved in every detail and even oversaw the dubbing of the final soundtrack . While Kricfalusi animated the 2D parts , he had John Kedzie to help him with the computer graphics and Sarah Harkey and Tommy Tanner to do the assistant animation . 
