I don't think it's nice, you laughing. You see, my mule don't like people laughing. He gets the crazy idea you're laughing at him.
15 seconds sound clip from the A Fistful of Dollars movie soundboard.
You can hear this line at 00:14:58 in the Blu-ray version of the movie.
Quote context
[...]
- He got all riled up when you men fired those shots at his feet.
- Hey, are you making some kind of joke?
- See, I understand you men were just playing around. But the mule... He just doesn't get it.
- Of course, if you were to all apologize...
- I saw the whole thing. You killed all four of them.
- You'll pay all right. You'll be strung up.
[...]