php - Silex redirect from Twig template

First, I know this is a horrible thing to do and should be done in controller logic only, but what I'm trying to do is create a custom redirect tag in Twig that fires a Silex redirect.

I have a custom node that outputs the following into the doDisplay template:

return $this->getEnvironment()->getExtension('silex')->getApp()->redirect('/', 301);

Basically this gets the Twig environment and the extension I created which has a getApp method which returns the Silex $app variable, which contains the redirect method.

But this only returns Array() to the screen. Any suggestions?