Who's The Next Pony to go Insane?

We’ve had mental meltdowns from Twilight, Pinkie and Fluttershy. Who’s the next of the Mane Six to go insane?

I’d like to see AJ go apeshit next and/or most spectacularly. Preferably as a result of realizing just how much of a small minded provincial she really is.

I’m thinking Rainbow Dash. She had a lot of freakouts (Sonic Rainboom, Games Ponies play, Mysterious Mare-do-well) but nothing too big. The potential is there though.

I want to see what it’d take to get Big McIntosh to go insane.

Lyra. (just because. ^_)

How about Shining Armor. :D

Non-Mane Six, Celestia. Perhaps why she groomed Twilight as a successor in Faust’s original vision.
 
Mane Six, Rarity. I think going nuts over a failed fashion show might work for her.

Spike.

Izzy moonbow