From A Fistful of Dollars
You see, I understand you men were just playin' around, but the mule, he just doesn't get it. Course, if you were to all apologize...
I don't think it's nice, you laughin'. You see, my mule don't like people laughing. He gets the crazy idea you're laughin' at him. Now if you apologize, like I know you're going to, I might convince him that you really didn't mean it.