Rainbow Dash is looking to break the wing power record for the tornado necessary to funnel water into Cloudsdale to make clouds. However, she needs everypony's help to do it, which is a hard requirement to reach when Fluttershy is so nervous about flying to perform.
Spitfire makes her first appearance since The Best Night Ever.
The Mule, from "Applebuck Season", makes a return appearance.
Derpy cameo: She is seen next to Fluttershy when Rainbow Dash drops her flyers on the ground. She's also seen in the crowd when Rainbow Dash is giving her speech and is also seen flying in the background many times during the training scenes.
Pegasus Ponies: (cheering) Fluttershy can really fly!
Pony Voices: (taunting) Fluttershy can hardly fly!
Rainbow Dash: Calling all pegasus ponies! Meeting tonight!
Flitter: (reads flier) Mandatory meeting for all Ponyville pegasi.
Rainbow Dash: Library, tonight. Be cool, or be mule. No offense.
Mule: None taken.
Cloudchaser: What exactly does this machine do?
Twilight Sparkle: This is an anemometer. It measures your accelerative velocity and translates it into wing power, thus gauging your cumulative H2O anti-gravitational potential. Any other questions?
Flitter: Yeah. (to Spike) What exactly does this machine do?
Spike: It tells you how fast you're flying and how strong your wings are.
"Wingpower" may be the Pony equivalent of horsepower, a unit of measurement commonly used to gauge the power of vehicle engines. Supposing horsepower and wingpower are equivalent, 10 wingpower would be similar to the power output of a Vespa motor scooter. Fluttershy's 2.3 wingpower is about that of an Olympic-calibre human athlete going on foot.
Applejack, Pinkie Pie and Rarity are all absent in this episode.
Friendship Report: Fluttershy learned that everyone's contribution is important, no matter how small it is, and that anything can happen if you believe in yourself.
This episode revolves around Fluttershy.
Twilight Sparkle: Do I look like I speak Squirrel?"
This is a reference to The Powerpuff Girls, where Bubbles (voiced by Twilight's VA, Tara Strong) regularly conversed with squirrels.
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