ooh! over here! I am a HUGE Cary Grant fan (see my profile) and I know what you're talking about.
Wasn't that a great line!
From a great movie! It's from the days when they knew how to mix chick movies with guy movies.
Do you remember the line, "Whoo did it? Whoooo did it? Who threw my palm tree overboard?" (Different movie: Just as great!)