The scarecrow costume was actually inhabited by actor Matthew Solari in every shot. The mask was even worn during ADR sessions to ensure the voice would remain the same.
The J-pop video that Jerod watches was created by director Adam Bolt just for the film. There is also a complete version of the music video, called 'Shock', available online.
The leading raven in "Vanished Acres", named Rocky, is best known for stealing Ewan McGregor's hat in the Tim Burton film "Big Fish."