The engineer laughs.
Engineer: 90? Tarnations, son, why'd ya ever be in such a hurry?
Doc: (covering) Well, it's just a little bet that he and I have, that's all. Theoretically speaking, could it be done?
Engineer: Well, I suppose if you had a straight stretch of track with a long level grade, and you weren't hauling no cars behind you - and if you could get the fire hot enough, I mean hotter than the blazes of hell and tarnations - well yes, you might be able get her up that fast.
Doc: When's the next train coming through here?
Engineer: Monday morning at 8 o'clock.
Cut to the waiting area. Doc and Marty are looking at a map of Hill Valley. The clock for the clocktower is on the platform - it's just been delivered. And the time on it is 10.04am! CLARA CLAYTON can also be seen waiting for someone to pick her up, although neither Doc nor Marty see her. As Doc describes the places, he shows Marty on the map.
Doc: Here. This spur runs off the main line 3 miles down to Clayton Ravine. There's a long stretch of track that will still exist in 1985. This is where we'll push the DeLorean with the locomotive. Funny, this map calls Clayton Ravine Shonash Ravine. Must be an old Indian name for it. It's perfect. Nice long run that goes clear across the bridge over the ravine, you know, over near that Hilldale housing development.
Marty: Right, Doc, but according to this map... there is no bridge.
And as we cut to the Ravine, we see Marty is right. There is a dead end for the tracks, and a sign saying the bridge is scheduled for completion in 1887.
Marty: Well, Doc, we can scratch that idea. I mean, we can't wait around a year and a half for this thing to get finished.
Doc: Marty...it's perfect! You're just not thinking fourth dimensionally!
Marty: Right, right. I have a real problem with that.
Doc: Don't you see? The bridge will exist in 1985. It's safe and still in use. Therefore, as long as we get the DeLorean up to 88 miles per hour before we hit the edge of the ravine, we'll instantaneously arrive at a point in time where the bridge is completed. We'll have track under us, and coast safely across the ravine!
Marty: What about the locomotive?
Doc grins.
Doc: It'll be a spectacular wreck. Too bad no one will be around to see it.
Clara: (o.s) Argh! Help me!
Doc turns to where the sound is to see a woman, Clara Clayton (who was at the station earlier) in the distance riding on a buckboard with out of control horses. They are heading for the edge of Shonash Ravine.
Doc: Great Scott! (to horses) Git!
Marty: (to his horse) Hiyah!
Doc catches up to Clara and manages to shout to her.
Doc: Jump!
She jumps off into Doc's arms just in time. The horses veer left at the end of the ravine, the wagon breaks off and falls down the ravine.
Doc: (to his own horse) Whoa.
Clara's hat sits on her head and covers her face.
Clara: Oh, thank you, sir, you saved my...
Clara lifts her hat and we (and Doc) see her face for the first time. Clara looks at Doc and can't speak for a moment.
Clara: ...life.
Doc stares back and his eyes grow wide. We get the felling both have fallen instantly in love with each other - love at first sight.