This is neither here nor there, but one of my coworkers has an African grey parrot who is notorious for not quite finishing phrases. She had the parrot trained to repeat her phone number in case he ever flew off, but he would usually stop the recitation after about five digits. The parrot knows the full string and/or phrase, but he is either too lazy or chooses not to say the entire thing. Apparently he's also been taught to say "Good birds get crackers" ... but he usually stops at "Good birds get crack."
Here's a link to The Alex Foundation, which focuses on Dr. Irene Pepperberg and her work with Alex, an African grey who's been the focus of much of Pepperberg's work into cognition and (human) language use/acquisition by parrots.