A Texan, a Russian, and a New Yorker go into a restaurant in London.

''Excuse me, but if you wanted the steak you might not get one as there is a shortage due to the mad cow disease,'' says the waiter.

The Texan says, ''What's a shortage?''

The Russian says, ''What's a steak?''

The New Yorker says, ''What's 'excuse me'?''