 Because they wanted it to be more comedic, and they wanted Michael J. Fox originally anyway, but he was doing Family Ties. And you can go on YouTube and watch the scenes. Yes, I've seen it. You sent it to me. He's playing it a little more serious, not as much of a comedy, and he didn't really have a lot of chemistry with Christopher Lloyd, who plays Doc Brown. And that, to me, is what makes the movie, is the chemistry between Michael J. Fox and Christopher Lloyd. Absolutely.