No, I gotta do somethin'.
6 seconds sound clip from the Tombstone (1993) movie soundboard.
You can hear this line at 00:50:10 in the Blu-ray version of the movie.
Quote context
[...]
- Do you see what's going on in the street? Somebody's gotta do something.
- I believe you're the sheriff.
- No, no. This is not county business. This is a town matter. Marshal?
- Why don't you just leave it alone?
- Hand those over, Curly. Hand 'em over.
[...]