She's Psychotic

Pinkie Pie's weirdness has an answer in the form of a mental disorder. When it goes out of control, she's transported to the Equestrian Mental Institution. What she finds? Help. Savior. Cure.
And.... romance.

Rainbow Dash is round Rarity's boutique posing for a costume when she breaks a dusty old teapot!
Rainbow just can't understand why she is so mad! Surely their friendship isn't finished over one old teapot?

Right?