I was going to say something similar to GQ - I remember seeing the movie with all three endings included in it. I know I didn't see it in the theater (as far as I remember), but I do know my grandparents had a VHS copy, and I watched it on TV several times, and each ending was shown. The first one was shown and then a caption read something like, "That's how it could have happened.." and then showed the next one and then the captions said, "But this is how it really happened," indicating the last one was the true ending.
I never knew that they showed the three different endings at the theater. That's pretty neat!