This is how Bumblebee and Rarity's Act of Generosity goes in My Little Pony Transformers Prime: Friendship is Magic.
[The ponies and Autobots come to a river]
Pinkie Pie: How are we gonna cross this?
Smokescreen: Don't ask me.
[The sound of crying can be heard]
Pinkie Pie: Huh?
Smokescreen: What is that?
[We see a sea serpent crying]
Steven Magnet: [sobbing] What a world, what a world.
Twilight Sparkle: Excuse me, sir. Why are you crying?
Optimus Prime: What troubles reduced you to tears?
Steven Magnet: Well, I don't know. I was just sitting here, minding my own business, when this tacky little cloud of purple smoke just whisked past me and tore half of my beloved mustache clean off, and now I look simply horrid. [wails]
Rainbow Dash: Oh, give me a break.
Arcee: You're telling me.
Applejack: That's what all the fuss is about?
Bulkhead: A simple mustache? It'll grow back.
Rarity: Why, of course it is. How can you be so insensitive? Oh, just look at him. Such lovely luminescent scales.
Bumblebee: [beeps] (translation: Nice cool skin.)
Steven Magnet: [sniffs] I know.
Rarity: And your expertly coiffed mane.
Bumblebee: [beeps] (translation: Excellent style.)
Steven Magnet: Oh, I know, I know.
Rarity: Your fabulous manicure.
Bumblebee: [beeps] (translation: Which is now completely gone.)
Steven Magnet: [gasp] It's so true!
Rarity: All ruined without your beautiful mustache.
Bumblebee: [beeps] (translation: I know.)
Steven Magnet: It's true, I'm hideous!
Rarity: I simply cannot let such a crime against fabulosity go uncorrected.
Bumblebee: [beeps] (translation: Neither can I.)
[Rarity and Bumblebee pull off two scales]
Steven Magnet: [yelp] What did you do that for?
[Rarity and Bumblebee look at the scales and at that moment look at each other and nod]
Twilight Sparkle: Rarity, what are you-
Optimus Prime: Bumblebee, I would not-
[Rarity cuts off her tail and Bumblebee scrapes off some of his paint. Rarity and Bumblebee jab the scales back on as Rarity and Bumblebee put the tail and paint on the sea serpent's face]
Steven Magnet: [moans] Oh-hohohoho! My mustache. How wonderful.
Rarity: You look smashing.
Bumblebee: [beeps] (translation: Especially now that your mustache is fixed.)
Twilight Sparkle: Oh, Rarity, your beautiful tail.
Optimus Prime: Bumblebee, why did you sacrifice your own paint for another sentenant being?
Rarity: Oh. It's fine, my dear. Short tails are in this season. Besides, it'll grow back.
Bumblebee: [beeps] (translation: I can just repaint it.)
Rainbow Dash: So would the mustache.
Arcee: Good plan.
[The water calms down]
Twilight Sparkle: [gasp] We can cross now. Let's go.
Optimus Prime: Follow us, Autobots.
[They are about to cross]
Steven Magnet: Allow me.
[He stretches his coils allowing them to cross]