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."