Indian smoke goes up in puffs, not in straight plumes.
3 seconds sound clip from the Flaming Feather (1952) movie soundboard.
You can hear this line at 00:21:03.430 in the DVD version of the movie.
Quote context
[...]
- Good night, mister Tex McCloud.
- I know. They could have turned off into any one of these canyons.
- Smoke down there at the base of that mesa when you left there, Lieutenant.
- What do you make of it, Sergeant? Look like an Indian smoke signal to you?
- Indian smoke goes up in puffs, not in straight plumes.
- On the other hand, that might be them Utes sitting down there among the rocks waiting for us.
- There's smoke over there at the foot of that ravine. We're going over to investigate.
- Keep your eyes peeled. There may be a trap.
- Flankers out right and left point.
[...]