The two pigs at the beginning of the opening theme.
Pig 1: You know, Rob, this is kind of funny.
Pig 2: Whaddya' mean?
Pig 1: Well, the two of us on a blanket eating sandwiches.
Pig 2: What's funny about that?
Pig 1: Because we're pigs! We can't talk! That's what makes it seem very humorous, are you with me?
Pig 2: What are you? A FATHEAD?!