The interior was an immobile studio set and not actually the interior of a street-capable version. The cockpit was oversized to fit cameras for scenes filmed in the Tumbler interior. In addition, another version of the car was a miniature model that was 1:6 scale of the full-sized one. This miniature model had an electric motor and was used to show it flying across ravines and between buildings. However, a full-size car was used for the waterfall sequence. The scale model scenes were filmed on a massive set built on a stage at Shepperton Studios in England over the course of nine weeks. The full-sized vehicles were driven and filmed on the streets of Chicago. In "The Dark Knight", the Batpod ejects from the Tumbler, with the Tumbler's front wheels as the Batpod's wheels; this was rendered using computer-generated imagery when attempts to achieve the separation through practical effects proved impossible.