- You sure that trail's open?
- I'm not sure of anything, major.
5 seconds sound clip from the Battle Circus (1953) movie soundboard.
You can hear this line at 01:21:14 in the Blu-ray version of the movie.
Quote context
[...]
- Sorry, major. You can't get through here.
- I'm moving a hospital. I've got a lot of casualties.
- Sorry, sir. The commies have put some guerrillas through our left flank.
- We've got them cornered about two miles down the road.
- You might get through there, though.
- I'm not sure of anything, major.
- Sergeant, tell them to get out of there but quick!
[...]