That's what's left of our army blowing up the ammunition so the Yankees won't get it.
6 seconds sound clip from the Gone with the Wind (1939) movie soundboard.
You can hear this line at 01:20:51 in the Blu-ray version of the movie.
Quote context
[...]
- If you make any jokes now, I'll kill you!
- Don't tell me you're frightened?
- I'm scared to death! And if you had sense of a goat, you'd be scared too.
- That's what's left of our army blowing up the ammunition so the Yankees won't get it.
- Just where were you figuring on going?
- Tara? Don't you know that they've been fighting all day around Tara?
[...]