Apparently, there's quite a bit about show business I don't understand.

5 seconds sound clip from the White Christmas (1954) movie soundboard.

You can hear this line at 00:53:34 in the Blu-ray version of the movie.

Quote context

[...]

- And it gives us a chance, you see, sir, to test new material.

- On what?

- On the audience. We use them like guinea pigs.

- Pigs, we can get for you. I'm not so sure about people.

- Well with all due modesty, sir, Wallace and Davis never had any trouble packing them in, sir.

- People that is, not pigs.

- Well, go ahead, if you want to.

- Apparently, there's quite a bit about show business I don't understand.

- Oh, it'll come to you, sir.

- Just takes time.

- Sure. We wouldn't be any good as generals.

- You weren't any good as privates.

- All right, kids, take it from the top once again. Bum-de-de-bum-bum, and! That's right, that's it. All right, keep it lively.

[...]