class MyController extends ActionController
{
    /* ... */
    public feedAction()
    {
        $this->getEvent()->setParam('disableLayout', true);
    }
    /* ... */
}

class View\Listener
{
    public function attach(EventCollection $events)
    {
        $this->listeners[] = $events->attach('dispatch.error', array($this, 'renderError'));
        $this->listeners[] = $events->attach('dispatch', array($this, 'render404'), -80);
        $this->listeners[] = $events->attach('dispatch', array($this, 'setLayout'), -999);
        $this->listeners[] = $events->attach('dispatch', array($this, 'renderLayout'), -1000);
    }

    /**
     * Make some decisions regarding the layout just before redering it
     *
     * @param MvcEvent $e
     */
    public function setLayout(MvcEvent $e)
    {
        if ($e->getParam('layout')) {
            $this->layoutScript = $e->getParam('layout');

        } elseif ($e->getParam('layout') === false) {
            $e->stopPropagation();
            $response = $e->getResponse();
            if (!$response) {
                $response = new Response();
                $e->setResponse($response);
            }

            $response->setContent($e->getResult());

            return $response;
        }
    }
}