And, for the record, I shall now say what the scene after the credits is:
Snape kills Mystique.... Yes, sad but true.
No, really.
SPOILER ALERT
The man without a concscious mind that the Proffesor was talking about earlier is seen lying in the hospital. A nurse comes in to take care of him and he begins speaking in Xavier's voice. The nurse says "Charles" and then it fades to black.
END SPOILER