Why didn't Fluttershy try to help Discord get a ticket? She just ignored the matter. Nobody knew the mail had delay. This is like Ticket Master again.
Also, I was surprised at first that he supposedly hadn't been invited, since we know Celestia's attitude towards giving the Grand Galloping Gala an interesting touch. I simply couldn't believe she would not invite Discord. (Twilight should know better by now, too. But that's an ongoing issue in general. So hard to get rid of old habits and ways of thinking.)
It generally lowers my enjoyment a bit when problems build up solely due to miscommunication. I know that it is one of the great challenges in the world, but still, it's a lazy technique and effectively made Fluttershy be uncaring. ... Couldn't keep the episode from being quite the enjoyable one though.
Anybody who thinks about shipping now needs to be put down.
At least she's not biting it anymore.
Elegantly implemented Metal Gear reference. (Although the perspective seems a bit off.)
Pinkie knowing it's Discord. Shaking the camera. OMG, so much highlevel pinkieness in one scene!
Shame is all about norms and contrast, isn't it?
And this closet is the jewelry wardrobe. Unguarded of course. Who needs guards in a royal castle? ... Oh wait.
Dear Discord... when the critics say that Maud Pie is funnier than you, then you really need to... ah, forget it, there's nothing you can do.
Pinkie's dress is lovely.
Dimensional portal: Now this is a somewhat more appropriate, not-so-much-immersion-breaking use of that technique. Apparently it's intended to be clashing. I'm just surprised it didn't cause lovecraftian mental distress. I guess they simply cannot fully perceive the otherness of that dimension.
P.S.: Tree Hugger has attained mastery in clichée. ^^