The epic conclusion to an space opera trilogy like Mass Effect 3 deserves an epic post-credits scene (also known as a "stinger").
Does this game follow the pattern of games like Halo, Metroid Prime, System Shock 2, and EarthBound and reward you for waiting through the ending credits with a short clip? Obviously, this scene wouldn't suggest a sequel, but I could imagine some sort of big reveal or the answer to a driving question.
Is there a post-credits scene in Mass Effect 3? If so, what does it show?