We're off, boys.
4 seconds sound clip from the The Big Trail (1930) movie soundboard.
You can hear this line at 00:28:52 in the Blu-ray version of the movie.
Quote context
[...]
- Get in. Get in, folks. We're goin'. Mount up. We're goin' now. Get in there.
- Sam's got a wooden leg below the knee...
- Never mind! I walk there, Useless. Come on.
- About time we were movin' on.
- Yeah.
- Willy! Come on, Willy. Forward!
[...]