Most of the officers chase after Buford's gang. The Deputy himself points his rifle at Buford's head.
Deputy Marshall: Buford Tannen, you're under arrest for robbing the Pine City Stage. You got anything to say?
Buford slowly spits some manure.
Buford: I hate manure.
Where is Marshall Strickland during all this? In a cut scene he was shot by Buford Tannen, but you could also say he was attending to other business or was attending a hanging or something like that. Meanwhile, back in Hill Valley:
Doc: (to Marty) Look!
Doc points to the broken tombstone. Marty gets the photo out just in time to see the tombstone vanish from the photo.
Marty: Yes!
Suddenly they hear the train whistle.
Doc: The train!
Marty: Can we make it?
Doc: We'll have to cut it off at Coyote Pass!
Music: A Science Experiment (The Train Part 1) by Alan Silvestri
Marty and Doc get on their horses. A BOY stops Marty.
Boy: Hey Mr, Mr Eastwood. Here's your gun, Mr.
He gives the gun to Marty.
Marty: Thanks, kid.
Marty spots Seamus by the saloon. Seamus grins at him and fakes a punch.
Marty: Seamus!
Marty throws the gun to Seamus. Seamus catches it.
Marty: Worth $12, never been used.
Seamus: Maybe I'll trade it for a new hat.
Marty: Right, and take care of that baby!
He and Doc ride off.
Seamus: I will!
Clara runs down the street and enters Doc's shop.
Clara: Emmett! Emmett! Emmett!
Clara sees the model Doc used to demonstrate the plan. She sees the model DeLorean.
Clara: (reading) Time machine.....
Doc and Marty meanwhile are chasing the train on their horses. Doc manages to climb on the last carriage.
Doc: C'mon Marty!
Marty: Argh, argh!
Doc: Ah, gimme your hand!
Doc grabs Marty's hand and pulls him onto the train. They both fall over on each other.
Marty: Argh! Whoa! Whoa! Argh!
Meanwhile Clara is following them on her horse. Doc and Marty runs across the roofs of the carriages.
Doc: Wa-ha!
Marty: Whoa!
Doc: Hoo! C'mon, Marty!
Marty jumps onto another car.
Marty: Argh!
Doc: C'mon, let's go! Masks on.
By now they're on the tender. They pull their bandannas over their mouths and climb over the tender, before dropping into the cab of the locomotive. Doc is holding a gun.
Doc: Reach!
The engineers (the same one we spoke to at the station a few days earlier, plus another one) put their hands up.
Engineer: Is this a holdup?
Doc and Marty look at each other.
Doc: It's a science experiment! Stop the train before you hit the switch track up ahead.
The train stops. Marty jumps out and changes the points.