The part where Shrek wants Donkey to track down Fiona (after seeing the Wanted posters). Donkey calls her scent "sweet and delicious" to which Shrek replies that it's his wife he's talking about. Turns out he was talking about his Trademark Favorite Food waffles.
At the end when the witches take off on their brooms, one of them can't get hers to start. It turns out she's pulling on Pinocchio's nose, and he's smiling too.