A word to you about escape. There is no barbed wire. No stockade. No watchtower. They are not necessary.
15 seconds sound clip from the The Bridge on the River Kwai movie soundboard.
You can hear this line at 00:12:53.909 in the Blu-ray version of the movie.
Quote context
[...]
- You British prisoners have been chosen to build a bridge across the River Kwai.
- It will be pleasant work, requiring skill. And officers will work as well as men.
- The Japanese army cannot have idle mouths to feed.
- If you work hard, you will be treated well. But if you do not work hard, you will be punished.
- We are an island in the jungle. Escape is impossible. You would die.
- Today, you rest. Tomorrow, you'll begin.
- Let me remind you of General Yamashita's motto: 'Be happy in your work.' Dismissed.
- Battalion, stand at ease. Fall out, Major Hughes. Battalion, stand easy.
[...]