Super Sonic Acorn-boom

Super Sonic Ancorn-boom is the sixteenth episode of the first season of Legends of the Multiverse: Friendship is Universe. Sally Acorn is worried about her performance in the Best Young Flyer competition, but she pulls off a super sonic rainboom, impressing the crowd.

Production and airing
This is one of the few times that the Treehouse channel does not mute the word "loser" in its airings of the episodes. Sally Acorn says "The Freedombolts will never let a loser like me join!" Two sound clips from Friendship is Universe, part 1 are reused. Nene's laugh is the same as her shocked scream when she noticed Kairi's unkempt hair. Spectra's inhale is Rapunzel's gasp (also reused for the crowd in that episode when Palutena is revealed to be missing) played backwards.

According to writer M. A. Larson, the episode was originally intended to show the concept of lightning kept in glass jars, but this was cut for time. The concept would later be recycled and used in the season five episode Chomp, Thanks for the Memories.

The scene when Sally saves Nene and the Fredombolts reappears in Deep Tissue Memories.

Prologue
Sally Acorn paces around Spectra Vondergeist in a review of their preparation for the Best Young Flyer competition. Satisfied that Spectra has an understanding of the elements of a good cheer, Sally wants her to go over the cheer itself. Much to Sal's frustration, Spectra's first three attempts are feeble. On the fourth attempt, which is just as weak, Sally collapses backward onto the grass, to which Spectra says, "Too loud?"

Preparing for the competition
Spectra watches ally practice a routine for the Best Young Flyer competition. Sally unsuccessfully attempts to perform a sonic rainboom and ends up crashing into the Destiny Library. She knocks over books that her friends just finished sorting. Sally tells her friends about the competition and says that the competition's grand prize is a day with her idols, The Freedombolts. Before she leaves, she tells Fluttershy to work on her cheering. Nene Amano urges Kairi Sparkle to find a spell that will allow the non-Pegasi friends to access Cloudsburg so they can support Sally. Nene volunteers to be the test subject of a spell that gives her a pair of beautiful butterfly wings.

Touring Cloudsdale
In Cloudsburg, Spectra and Rainbow Dash run into three bullies who say that Sally can't pull off the sonic rainboom. She doubts her own flying skills after the bullies leave. The rest of the Main Group Six arrive and explain that Kairi cast a spell that enables them to walk on clouds like Pegasi. The friends tour the weather factory, where Captain Toad manufacture snowflakes, rainbows, and clouds. The workers stop to admire Rarity’s wings, much to Sally's chagrin; one worker even suggests that she enter the Best Young Flyer competition. Rarity decides to participate in the competition, much to Sally's shock.

The Best Young Flyer Competition
At the Cloudeseum stadium, the competition begins. Princess Palutena and three Freedombolts (Rotor the Walrus, Antoine, and Nicole the Holo-Lynx) are the judges. The competitors have number tags on their flanks:


 * 1) Lila Sawyer
 * 2) Sally Acorn, moved to #5, #6 and finally #15
 * 3) Stella Trent
 * 4) Nene Amano, who ends up performing with Sally Amano
 * 5) Dr. Fox, moved to #2
 * 6) Vanellope von Schweetz, moved to #5
 * 7) Melody Piper, who exclaims "Let's DO THIS!"
 * 8) Clover Ewing
 * 9) Sprinkle Penguin, tag obscured, possibly #10
 * 10) Unknown. Spectra remarks, “She just looked like such a nice weasel.”
 * 11) Youngmee Song
 * 12) Harley Quinn, #15 and presumably moved to #6

Sally Acorn switches her tag with other competitors to delay her turn. When everyone except Rainbow Dash and Rarity has gone, the announcer tells them that they will have to perform together due to time constraints.

The sonic rainboom
Sally Acorn makes several mistakes in the first two phases of her routine. She starts phase three: the super sonic rainboom. Meanwhile, Nene, dressed in an extravagant costume, flies higher to let the sunlight illuminate her wings. However, the wings are too delicate for the sun's rays and they quickly burn to ashes, sending her plummeting towards the ground. The Freedombolts immediately dive to rescue her, but Nene’s flailing limbs end up knocking them out cold. Seeing the potentially deadly situation they're in, Sally Acorn hurtles down to save them. She pulls off the super sonic rainboom, exciting Spectra into a loud cheer and astonishing the rest of their friends into speechlessness, and catches them just before they hit the ground.

Epilogue
Nene apologizes to her friends for getting carried away with her wings, and they forgive her. Princess Palutena presents the grand prize for Best Young Flyer to Sally Acorn. Nene gives this episode’s friendship report and says that she learned to be there for her friends while keeping her hooves on the ground, literally and figuratively. The three bullies congratulate and apologize to Sally Acorn, who forgives them. Dumb-Bell asks her if she wants to hang out with them and hopes that she will teach them how to do the super sonic rainboom, but Sally replies that she's already got plans to hang out with the Freedombolts.

Quotes

 * Sally Acorn: ... Ugh. You're gonna cheer for me like that? Louder.
 * Spectra Vondergeist: Yay.
 * Sally Acorn: Louder!
 * Spectra Vondergeist: Yay.
 * Sally Acorn: LOUDER!
 * Spectra Vondergeist: [deep breath] [quietly] Yaaay.
 * Sally Acorn: Ugh...
 * Spectra Vondergeist: Too loud?


 * Spectra Vondergeist: Way to go.


 * Spectra Vondergeist: Sally Acorn, you rock. Woohoo.


 * Spectra Vondergeist: And here's where they make the rainbows.
 * Rapunzel: [lick] Ack! Pwah! [pants] Spiiicyyyy! [monkey screeching]
 * Sally Acorn: Yeah, Rainbows aren't really known for their flavor.


 * Nene Amano: [panting] Look upon me Multitopia! For I... am... NENE!


 * Spectra Vondergeist: A super sonic acorn-boom! She did it! She did it! WOOO-HOOOO!


 * Sally Acorn: [gasp] Oh my gosh, oh my gosh, oh my gosh, oh my gosh, oh my gosh!
 * Rotor the Walrus: So you're the little squirrel who saved our lives. We really wanted to meet you, and say thanks.
 * Sally Acorn: Oh my gosh, oh my gosh, oh my gosh, oh my gosh, oh my gosh...