Because iocane comes from Australia, as everyone knows.
5 seconds sound clip from the The Princess Bride (1987) movie soundboard.
You can hear this line at 00:32:25 in the Blu-ray version of the movie.
Quote context
[...]
- I'm not a great fool, so I can clearly not choose the wine in front of you.
- But you must have known I was not a great fool. You would've counted on it.
- So I can clearly not choose the wine in front of me.
- You've made your decision then?
- Because iocane comes from Australia, as everyone knows.
- And Australia is entirely peopled with criminals.
- And criminals are used to having people not trust them, as you are not trusted by me.
- So I can clearly not choose the wine in front of you.
- Truly you have a dizzying intellect.
- Wait till I get going! Where was I?
[...]