Shrek: Have any of you ladies seen my donkey?
Donkey: Who are you callin' donkey?
(pan to reveal that Donkey has become a white stallion)
Shrek: Donkey?! You're a...
Donkey: A staaaaallion, baby! I can whinny... (whinnies) I can count... (paws his hoof on the ground) Look at me, Shrek! I'm trotting!