Man, Cartman is hilarious.
Another great one is Cripple Fight. Jimmy fighting Timmy. After they begin to fight, Cartman runs into a packed church and yells "CRIPPLE FIGHT" and it empites out.
Then the next scene is people in a food store, and Cartman goes on the loudspeaker, "Ladies and gentlemen, we have cripple fight, cripple fight in the parking lot." and the place clears out.