You better think before you answer, young lady, unless you wanna go to jail.
5 seconds sound clip from the The Asphalt Jungle (1950) movie soundboard.
You can hear this line at 01:29:43 in the Blu-ray version of the movie.
Quote context
[...]
- Tell the commissioner the truth. That's the only thing to do. Come on.
- Andrews, repeat the statement Miss Phinlay made before you yesterday afternoon.
- She said Mr. Emmerich was here in this house with her from 11:30 PM to 3:00 AM last Friday night.
- Is that the statement you made?
- You better think before you answer, young lady, unless you wanna go to jail.
- Jail?
- Mr. Emmerich wouldn't commit a crime.
- It's the only thing to do, unless you want to be indicted for obstructing justice.
[...]