Well, just when you gonna start this shootin'?
5 seconds sound clip from the The Big Trail (1930) movie soundboard.
You can hear this line at 01:44:15 in the Blu-ray version of the movie.
Quote context
[...]
- We're lost! There ain't a man here that knows the pass over them hills!
- Wait! Wait! Follow me and I'll lead you to that valley that Coleman told us about.
- Coleman, huh? He's the only one that knows the way out, and he's deserted us!
- If he was here, I'd shoot him down in his tracks.
- Well, just when you gonna start this shootin'?
- You're just in time, Coleman.
- They're all against me. They're turning back.
[...]