Nancy Cartwright in Auckland

I saw Nancy Cartwright's (Bart Simpson) One Woman Show show at the comedy festival. It’s a mixture of Simpsons sketches, behind the scenes tales/trivia and how being America’s best known 10 year old boy changed her life. The vocal performances were just amazing but one thing had me puzzled; Why did a theatre full of Aucklanders erupt in laughter at Ralphs inane cry “I’m Idaho!” in this sketch? *

Principal Skinner hands out awards at the geography pageant;
Skinner: And special awards go to the two students who obviously had no help from their parents: Lisa Simpson and Ralph Wiggum.
Ralph: I'm Idaho!
Skinner: Yes, of course you are.
www.snpp.com/episodes/1F08.html
* Perhaps like me they have friends from Boise to annoy with blog posts!