Re: The most craziest abroad!
My older brother used to tell story of one of his friend who came to USA and went to have dinner in one of NY restaurant. Not not desi restaurant Some American Chain kind.
So he saw a black waiter and called him like this: " Oye Khotay Day Puttar , Come here" . Thinking that this waiter is African American.
The waiter rushed to the table very upset and all ready to jump on him saying " Chee Ray, Um Bhee Karachi Say hoon , gali kiss ko dia ? " 
He was a Makrani from Karachi. But after that incident they became very close friends.