I was wondering the same thing.
5 seconds sound clip from the McLintock! (1963) movie soundboard.
You can hear this line at 01:57:31 in the Blu-ray version of the movie.
Quote context
[...]
- Reckon that's about all the excitement you'd want for one Fourth of July, eh?
- Old Puma finally got his way.
- But I reckon he's riding out his last war party.
- Well, he won't get very far.
- But one thing still has me puzzled. Where did they get the guns?
- I was wondering the same thing.
- My kidney's been bothering me, Bunny.
- Joke! Do you think that was a joke?
[...]