Gordon, and Coffee Creme arrived at Cheyenne with a freight train. They saw the Sherman, but didn't know why it was there.

Gordon: *Thinks of a plan* It's here. Finally.
Coffee Creme: What is?
Gordon: My tank. I ordered it from a shipping company, and they delivered it to me at last.
Coffee Creme: wewe must be very rich if wewe can afford a tank.
Gordon: Right. *Stops train near entrance of train yard* We just have to back this up, and get the train into the yard.
Red Rose: *Switches track*
Gordon: *driving backwards into yard*
Coffee Creme: Stop so that the-
Gordon: Caboose is near the switch track. I know. *Stops*
Wilson: *Drives engine to caboose*
Gordon: Wait here, I'll be back. *teleports to end of train*
Wilson: How was your trip?
Gordon: Good. *Uncouples caboose* wewe can take this to the other cabooses, and then use the engines on my train to push the cars down the hump.
Wilson: But they aren't switch engines.
Gordon: Does it matter? Get the job done! *teleports back to Coffee Creme*
Coffee Creme: Welcome back.
Gordon: Yeah. Now, we go to the tank, and I'll onyesha wewe how great I am at driving it. *Teleports himself, and Coffee Creme to the tank*

No one was around when they arrived.

Gordon: *gets in tank*
Coffee Creme: *Waiting outside of tank*
Gordon: *Starts tank*
Pete: *Hears tank* Oh shit. *Runs towards tank*
Gordon: *Starts driving the tank* Weeee!! This is fun.
Coffee Creme: He really can drive a tank.
Pete: *arrives* Who's driving that thing?!
Coffee Creme: Gordon.
Pete: I should have known.
Gordon: *turns tank around* Pete's there to see me... Whoaeihotsuesuahgt, PETE?!!
Pete: Gordon, stop!
Gordon: *Tries to stop tank* I don't know how to stop this thing!! *Drives past Coffee Creme, and Pete*
Coffee Creme: At least he didn't kill us.
Gordon: *Driving tank towards Sherman Hill* What do I do? *Opens hatch* HELP! I'm on a runaway tank!!
Snowflake: Jesus christ.
Orion: And I thought I've done stupid things.
Gordon: *Driving away*
Pete: We need to stop him. Pierce, get a Bigboy right now!
Hawkeye: I'm on it. *Runs to servicing facility*
Jeff: *Maintaining engines*
Hawkeye: Pete wants me to use a Big Boy. Do we have any?
Jeff: Number 4012 is available.
Hawkeye: Good, I'll use that one. *gets into engine*
Jeff: *gets in engine* Might I ask why wewe need this?
Hawkeye: To save the day. *Drives engine*
Gordon: *Going up hill*
Mafia Ponies: *Taking spikes out of train tracks*
Gordon: *Sees mafia* Oh no wewe don't. *Aims turret, and pulls trigger* What? No ammo! What kind of a dumbass would own a tank, and not put in any ammo?!
Mafia Ponies: Let's get outta here! *Running away*
Gordon: Good. Now they know not to fuck with us. *drives back to station, but is destroying the track*
Hawkeye: *Driving towards Gordon* I see his tank.
Gordon: *Drives out of way*
Hawkeye: *Stopping engine*
Jeff: Will we stop in time?
Hawkeye: I hope so.

They stopped just before the pilot wheels became derailed.

Gordon: *Driving back to station*
Percy: He's coming back.
Pete: Oh no.
Gordon: This is it. I'll be stuck in here forever.

But suddenly, the tank stopped.

Pete: What?
Gordon: *Comes out of tank* hujambo everypony. I saved the day.
Ponies: *Booing, and throwing garbage at Gordon*
Pete: wewe used up all the gas on this thing!
Gordon: Oh well. *Walks away from everypony* I tried my best.

The End

On The inayofuata Episode Of Ponies On The Rails

We get to see some mail trains in action