The Roller Coaster of Good News and Bad News

The train sequence was apparently storyboarded and scripted for the first movie, but then moved over in isolation. The key to really good action writing is to have this roller coaster of ups and up and down the motions. So it's constant. Good news bad news. You don't want to just keep going. And with this constant up and down roller coaster of good things happening, bad things happening, successes failures, successes, failure, even an up and down train track.