Water in the carburettor

WIFE: "There's trouble with the car. It has water in the carburettor."

HUSBAND: "Water in the carburettor? That's ridiculous."

WIFE: "I tell you the car has water in the carburettor."

HUSBAND: "You don't even know what a carburettor is. I ll check it out. Where's the car?"

WIFE: "In the pool."