Rainbow Dash (Rainbow Factory)

Young pegasi whom failed their flight school graduation test, were disgraced, they are taken away by a windowless carriage. Sent away to a mysterious destination which turns out to be "The Factory", the place where the weather is made. Specifically, they get sent to the Rainbow Facility, a section of the factory off-limits to visitors, which has led to many rumors about how exactly the Spectra, the colors of the rainbow, are manufactured.

A stallion named Dr. Atmosphere orders guards with tazers to prod the fillys and colts whom had failed their test into a room with chains hanging from the ceiling. A large piece of machinery occupies one end of the room; the machine has a wide opening at the top and tubes that lead from the device to several tubs on the floor. The tubs contain pure Spectra.

Not long after the groups arrival, several older ponies appear on the scaffolding above the machine and announce that while the flight school rejects are "worthless" to Cloudsdale, they are still going to serve a purpose.

There were many masked ponies that watched as the group looked around in confusion and horror.

"When Luna was banished a thousand years ago, Celestia had to take on raising the moon as well as the sun.. she outsourced the creation of rainbows to the Pegasi of Cloudsdale. We soon found a way to do so without the help of unicorn magic: by harvesting ponies to extract the Spectra directly." The blue masked pony who was speaking looked over the mass group of failures.

"The graduation tests therefore serve the dual purpose of ridding Cloudsdale of "the weak"..and ensuring the supply of Spectra with ponies whose disappearance won't be questioned."