"Out of all the things that could happen, this is THE! WORST! POSSIBLE! THING! "

(confusion) "Applejack! Were you reading a bedtime story to... An apple tree?"
" Nice is an understatement. I look *fabulous*! Who says camouflage has to be drab?"

(melodramatic) "I'm never coming out! I can't show my face in Ponyville ever again! I used to be somepony! I used to be respected! I made dresses - beautiful, *beautiful* dresses! But now, everypony is *laughing* at me! I'm nothing but a *laughing stock*!"
" LEAVE ME ALONE! I *want* to be alone! I want to wallow in... whatever it is that ponies are supposed to wallow in!... Do ponies wallow in pity?... Oh, listen to me! I don't even know what I'm supposed to wallow in! I'm so PATHETIIIIIC! "
(say something you think will fit the character)