You've got to do it, boy. You've got to do it now!
4 seconds sound clip from the The Bridge on the River Kwai movie soundboard.
You can hear this line at 02:34:55.803 in the Blu-ray version of the movie.
Quote context
[...]
- He's gone mad. He's leading him right to it. Our own man!
- I was right. There is something going on.
- You've got to do it, boy. You've got to do it now!
- Have you a knife? I've just realised the bridge has been mined!
- Mined?
- Officer, sir, British officer! Here to blow up the bridge.
- Yes, sir. British commando orders, sir.
[...]