Batpod

The Batpod ejects out of the Tumbler's front end, making the Tumbler's front wheels both of the Batpod's. Because the Tumbler is ordered to self-destruct, the Batpod allows Batman to continue his pursuit. For the film, the bike is armed with grappling hooks, cannons, and machine guns. Six models were constructed for the film's production to anticipate some of them crashing.
One action sequence in the film shows the wheels rolling against their normal axes, seemingly for added stability in sharp turns or other maneuvers. This also allows for instant changes in direction - if the driver approaches a wall, the Batpod's central frame will rotate to keep the driver upright.