* In a few shots of the biplane shooting at Miley Cyrus the bullets are absorbed and they do no harm.
* The skyscraper featured in the climax starts off attached to some other large buildings, but becomes isolated by a network of roads in later shots.
* The maple syrup bottle changes positions in scenes.
* Chris gets a black eye from Quagmire in the middle of the night, yet by the next day, he's completely healed.
* When Peter puts his head between the tied-up logs you can see a beige phone beside the back door in the kitchen. But when he sits at the next shot, the phone disappears.