You know, it's one thing for him to play around with explosives like a kid with firecrackers...

4 seconds sound clip from the The Bridge on the River Kwai movie soundboard.

You can hear this line at 01:37:32.272 in the Blu-ray version of the movie.

Quote context

[...]

- I understand, go ahead.

- Well, Chapman will be fine. Ice water in his veins.

- Joyce is... He'll be okay.

- It's Warden I don't get.

- Oh? Why not?

- Oh, Cambridge don and all of that.

- You know, it's one thing for him to play around with explosives like a kid with firecrackers...

- Well, he's not without experience, you know. When we lost Singapore, he stayed behind and blew up a couple of bridges, one or two trains, and I don't know how many other installations before the Japs caught him.

- Caught him?

- Fascinating story.

- Sir, it's most annoying. They say, in view of the time element, they don't think a few practice jumps would be worthwhile.

- No?

- They say if you make one jump you've only got 50 percent chance of injury. Two jumps, 80 percent. And three jumps, you're bound to get your packet.

[...]