Don't blame you in a bit.
4 seconds sound clip from the Dark Command (1940) movie soundboard.
You can hear this line at 00:02:27 in the Blu-ray version of the movie.
Quote context
[...]
- Give me two dollars and we call it square. What do you say?
- Must've hit you pretty hard to loosen up that tooth. What's the trouble?
- I said President Pierce was a polecat. Which he is! Then he popped me.
- Just wait till I get him in Kansas.
- Am I a dentist? My friend, you're looking directly at the best dentist west of the Mississippi.
- What seems to be your trouble?
- Big fella back there belted me on the mouth.
[...]