Dr. Hartman mentions attempting to clone a chicken and says he ended up with "a man-sized chicken who was incredibly hostile". Peter then says "Doc, we'll have to have a talk about this later." This is a reference to the giant chicken Peter fights sometimes and gives an explanation to how he appeared.
The Dallas Galleria and the Hilton Hotel, adjacent to one another, off of Interstate 635 in Dallas TX, can be seen during the montage of Peter dancing to Madonna's "Ray of Light".