Does Halo: Campaign Evolved have a post-credits scene?

An explanation of what happens during the Halo: Campaign Evolved ending, secret ending, and post-credits scene.

Did you know there is a secret Halo: Campaign Evolved ending? Well, it's more of a post-credits type of scene than an actual secret ending, but it implies that a certain someone is still alive , and it's done in a hilarious fashion. The non-secret ending also poses some questions, especially for anyone playing Halo for the first time.