People have given me classified information, but always with the disclaimer 'This can never end up in a book.' And it never does.
I used to love to untangle chains when I was a child. I had thin, busy fingers, and I never gave up. Perhaps there was a psychiatric component to my concentration but like much of my psychic damage, this worked to everyone's advantage.
I think Australians do well here because we feel a bit naughty, like we're in America and if they only knew how much fun we were having, we'd all get thrown out, you know.