The train is halfway across the bridge, and Griffons are trying to kill Celestia and other ponies at the engine, but back at Equestria

Luna: Where is my sister?
Pinkie Pie: I don't know! griffons kidnapped her!
Fluttershy: They took other ponies as well.
Luna: Well then lets get them back *turns Pinkie and Fluttershy into Griffons*
Fluttershy: We look exactly like griffons.
Luna: that's the idea.
Pinkie Pie: Now that were a different animal we must speak another language.
Luna: No آپ shouldn't.
Pinkie Pie: *spots Applejack* Ich werde applejack کی, اپپلیجاک tauschen.
Applejack: Griffons!
Pinkie Pie: Hallo, Ich bin Pinkie Pie.
Applejack: Why are آپ speaking german, and how come you're a griffon?
Luna: I cast a spell to turn her into a griffon, and now she thinks she has to speak a different language.
Pinkie Pie: Ja.
Fluttershy: Ok that's enough.
Applejack: Fluttershy آپ two?
Luna: We're wasting time here! *teleports them onto the train*
Roseluck: Luna, what are آپ doing here?
Luna: Saving my sister, but let Pinkie and Fluttershy take care of this.
Pinkie Pie & Fluttershy: *kills griffons*
Gilda: Oh shit! مزید ponies behind us. *kills Vinyl Scratch*
Griffon 4783: I thought that hedgehog was watching them!
Gilda: I thought so to.
Luna: Keep fighting!
Celestia: Luna! Why are آپ here?
Luna: To save آپ sister. We have to get off this train.
Twilight: But our unicorn horns are missing.
Luna: I can restore your horns now lets go! *teleports ponies back to Equestria*

yup they forgot me, this can't be good.

Sean: Almost done defusing it.
Gilda: What happened? Why are آپ trying to defuse the bomb?!
Sean: So the ponies wont die.
Gilda: Well they just left!
Sean: Goddamnit! *kills Gilda*

other griffons: Freeze!
Sean: How about I burn instead? *detonates bomb*

The train has blown into smithereens, with all the griffons inside. I also destroyed the bridge.

Back at Equestria things were back to normal.

Twilight Sparkle: Where did Sean go?
قوس قزح Dash: I'm not sure. He must have gone down without a fight.

The End