What's the matter with you? Why are you so dang stupid?
3 seconds sound clip from the For a Few Dollars More movie soundboard.
You can hear this line at 00:51:15.392 in the Blu-ray version of the movie.
Quote context
[...]
- I didn't come here to listen to you rattle on about trains.
- I want to find out about this man. It's obvious you don't know anything.
- I guess I better leave before you go and lose your temper.
- What's the matter with you? Why are you so dang stupid?
- Well, why didn't you tell me that in the first place, my boy?
- Of course I know the man you're trying to find out about. Of course I know him.
[...]