Missing Method in HallController

Error: The action sk230821-0941.jpg is not defined in controller HallController

Error: Create HallController::sk230821-0941.jpg() in file: app/controllers/hall_controller.php.

<?php
class HallController extends AppController {

	var $name = 'Hall';


	function sk230821-0941.jpg() {

	}

}
?>

Notice: If you want to customize this error message, create app/views/errors/missing_action.ctp