I wouldn't look so happy if I were you, because if anything does happen to Cole...
6 seconds sound clip from the El Dorado (1966) movie soundboard.
You can hear this line at 01:46:33 in the Blu-ray version of the movie.
Quote context
[...]
- From there on in, Maudie's gonna have to tell you what happened...
- Yeah, he was all right when I saw him last, except his side seemed numb.
- Yeah. Well, it's not too good, is it?
- I wouldn't look so happy if I were you, because if anything does happen to Cole...
- Sheriff! Sheriff, can you hear me? It's Nelse McLeod.
- Your friend Thornton's got something wrong with him, but it wasn't our doing.
[...]