http://www.snpp.com/episodes/2F13.html
Bart vs. Australia
Original airdate in N.A.: 19-Feb-95
The family walk out of the embassy. Bart passes a sign saying "Now Entering Australia."
Bart: Hey, G.I.Joe: your sign's broken. We're already in Australia.
Marine: Actually, Sir, the embassy is considered American soil, Sir!
Homer: Really? Look, boy, now I'm in Australia...[hops over the line] Now I'm in America...Australia! America!
Bart: I get it, Dad.
Homer: Australia! America!
Marge: Homer, that's enough!
Homer: Australia! America! [gets punched] Ow!
Marine: Here in America we don't tolerate that kind of crap, Sir!