Hyperventilate(verb):
1: to breathe abnormally fast or deeply as so to effect hyperventilation.
2: to breathe in this manner as from excitement or anxiety.

Hyper(adjective):
1: Having a very excitable, or nervous temperament; high-strung.
2: Emotionally stimulated or overexcited.

It's Pinkie Pie's birthday. Her twenty-first, to be precise.
Wait.
If it's her birthday, then who's planning?
None other than her girls, of course. Although, this time, Twilight has decided to tell Pinkie what they're doing. After all, they don't want a repeat of Pinkie's sweet sixteenth.
Twilight and the gang are hyperventilating. Pinkie is just hyper.

No cover art yet, because copyright and whatnot should be respected, unless you're quoting. Once I draw one, I will post it, and onto my DA as well.