Hmm, care to be more specific? Not so much what it said, but where, so I can narrow my hunt?
First and foremost - I'm in no way saying I got the 'alternate' ending.
I just played the game differently than I normally would - and some places that I can remember getting different responses were when attempting to get Michael to write, when Michael was going to leave in his car, and also in Michael's journal. There might have been others, but I don't recall them right now.
Like I said, I would love to know how 'alternate' the alternate ending actually is. It would be really funny if we had actually seen it without knowing.