Well, you don't mean it. I mean it.
3 seconds sound clip from the Suddenly (1954) movie soundboard.
You can hear this line at 00:26:17 in the Blu-ray version of the movie.
Quote context
[...]
- No, we don't change the pattern at all. Give Benny a hand.
- Mr. Baron, uh, something I don't understand.
- I was in the service myself... So you told me.
- And though we made every precautionary check, we never went to extremes like this unless...
- Unless you were tipped that there was to be an attempted assassination.
- Well, you don't mean it. I mean it.
- But you're F.B.I. Secret service is responsible for the safety of the president.
- We're using everybody this trip, Mr. Benson.
- State troopers, your local law enforcement agencies and us.
- You don't know if old Dan Carney is down there, do you?
[...]