spoiler ending

How did Carter know about it all? He would have thought her completely psychotic. She would have been in jail for murder not at a diner with him watching Danielle on TV.
The only reason he believed her in them segments is because she told her predictions and they came true................... In that last segment she ran of as soon as she awoke.
I don't care how beautiful you are, I ain't believing you and your story of how you lived a day over and over again that resulted in your roommate being killed by you.
I'd believe you were nuts beyond help.
Dumb ending to what was an enjoyable movie.

If I am wrong in some way, help me see things straight.

Enjoy your day