Just watched "The Best Night Ever" with commentary.
1. The reason Rarity didn't want to let Spike into the dressing room is because she didn't have her false eyelashes on.
2. They actually pointed out the infamous cyclops pony.
3. A few brief jokes about how Equestria is a matriarchy.
4. The choir in "At the Gala" was actually a
Throw It In moment. Daniel Ingram was working on the song and wanted to think of a way to make it more epic, when Michelle Creber's mother told him that she worked with a local volunteer choir that would do it for free. So there you have it.
5. Octavia is mentioned by name, and she plays double-bass.
6. The pony with the turtleneck and telescope cutie mark that AJ tries to sell her food to is based on Carl Sagan
7. The scene where Pinkie Pie is bouncing around everywhere apparently had House of Pain's
Jump Around
as a scratch track before they put in the actual BGM. Which they tried to limit to piano, harp, bass, and tuba, because those are the instruments the band has.