In the barn, everypony is grumbling in annoyance and disappointment. They had planning a payback prank on Rainbow by pretend to be 'cookie zombies'. However, the plan had backfired as Rainbow had managed to break through the roof and escape

Bon Bon: Annoyed Some plan that was!

Lyra: Also annoyed Agreed! This was the worst idea you've ever thought, Twilight!

Twilight: Indigent Me?! Why are you all jumping on me?!

Silver Spoon: Cross You were the one who said that we should a trick back on Rainbow Dash!

Octavia: Also cross You said that by scaring her it would knock some sense into her!

Vinyl: Cross as well And look what's happened!

Cup Cake: Cross and upset She's escaped!

Apple Bloom: Angry And ruined the cookies! Points at the cookies which have now been spoiled by the dust from the roof when Rainbow broke through it

Sweetie Belle: Angry and upset We can't deliver any of these now!

Doctor Hooves: Ticked off Have you forgotten that Rainbow can fly?!

Roseluck: Cross Clearly, you didn't think this all the way through!

Daisy: Annoyed You make Derpy look smart!

Twilight: Defensively I DID think all the way through! I just...! I just...!

Applejack: Cross You just what?!

Twilight: I just...miscalculated!

Cranky: Annoyed Oh, she miscalculated!

Diamond Tiara: Annoyed as well Oh, look at that!

Carrot Cake: Annoyed Did you now?!

Twilight: Angrily and defensively Yes, I did!

Spike: Fed up You're an idiot, Twilight!

Twilight: Getting angry Shut up, Spike!

Rarity: Angry Don't you dare say that to Spikey-Wikey!

Twilight: Getting more angry Stay out of it, Rarity! I only wanted to teach Rainbow a lesson!

Applejack: Angry Yeah, and look how that turned out!

Scootaloo: Reaching her limit OH, SHUT UPPPPPPPP! SHUT UP! ALL OF YOU, SHUT UP! HOLY CRAP! PLEASE, SHUT UP!

Everypony is most taken aback

Twilight: Taken aback The buck is wrong with you?!

Scootaloo: Really pissed off WHAT DO YOU MEAN WHAT'S WRONG WITH ME?! I LISTEN TO EACH OF YOUR DUMBASS! THAT'S WHAT'S WRONG WITH ME! NOW RAINBOW DASH THINKS THAT I'M THE WORST LITTLE SISTER IN THE WHOLE OF EQUESTRIA, THANKS TO ALL OF YOU!

Applejack:....You are aware that...?

Scootaloo: Still pissed off SHUT UP, APPLE-BUCKING-JACK! ACTUALLY SHUT UP!

Pinkie Pie: Also pissed off HEY! ANYPONY HERE REMEMBER FUN?! I'LL GIVE YOU A HINT: IT'S THE EXACT OPPOSITE!

Fluttershy: Reaching her limit EVERYPONY, STOP-!

?????:....The dead.....

Everypony stopped arguing and blinked in surprise

Everypony: Confused Huh?

Twilight: Confused Hello?

Fluttershy: Confused Who's there?

????: Disrepect....the dead....

Applejack: Annoyed, thinking that Rainbow playing another trick Very funny, Rainbow!

Rarity: Annoyed, also thinking that it's Rainbow Truly terrifying!

They all look around, but they can't see Rainbow

????:....Disrepect....

Just then, five dark shapes appear before. They are as black as coal and seemly don't have faces

Apple Bloom: Getting scared What's going on...?

Silver Spoon: Getting frightened Who are you...?

????: You....disrepect....

Then suddenly, the dark shapes open their eyes, revealing themselves to be....!

Ghost Pony:...THE DEEEEEAAAAD!

Everypony: All scream in alarm and fright

Everypony JUMPED! Several faces appeared on the ponies where there haven't been before! They was gaunt and grimacing, their eyess full of nothing but pure anger and hate!

Ghost Ponies: Angry You disrespect the dead! You disrespect the dead! You disrespect the dead!

Twilight: Frightened B-B-B-But, we didn't!

Fluttershy: Frightened W-W-We w-w-were o-only trying t-t-to t-teach a f-f-f-f-f-friend a l-l-lesson!

Rarity: Frightened We weren't b-being disrespectful to y-y-you!

Ghost Ponies: Still angry You disrespected us! You made a mockery of us! Out of all the zombies tricks we've seen, yours is the most insulting!

Lyra: Begging for mercy We're so sorry if our prank offended you guys!

Bon-Bon: Begging, close to tears We promise we'll never do it again!

Applejack: Frightened We'll....we'll get rid of the cookies!

Pinkie: Shocked WHAT?! But...!

Fluttershy: Covers Pinkie's mouth Shhhh!

Cup Cake: Frightened We'll destroyed the cookies!

Carrot Cake: Frightened We'll burn 'em!

Big Mac: Scared Eeyep!

Apple Bloom: Shaking in fear We'll never play any tricks again!

Diamond Tiara: Scared Never ever!

Scootaloo: Begging We'll never play any more tricks on my big sister again!

Sweetie Belle: Begging-Crying Please, just don't hurt us!

Ghost Ponies: Still angry Don't forget that one day, you'll be dead too! And you'll be just LIKE US!

This was now too much for everypony!

Everypony: In pure horror OOOOOOOH!

They then all run away, screaming their heads off!

Uh-oh! Looks like everypony's prank of being 'cookie zombies' has angered the dead! Never disrespect the dead, folks, or the dead will come for you! :O

References:
https://youtu.be/fEoqUsaN1bk?si=6yYLMc0m-OQ-e2ac
https://youtu.be/73PLbg2Z1LQ?si=iL7Pr2cHSuqotvXr
https://youtu.be/3ekgDxLuIb4?si=J21WnGxv1EctuSqk