- No kidding. How come?
- How the hell do I know how come?

3 seconds sound clip from the The Return of the Living Dead (1985) movie soundboard.

You can hear this line at 00:02:07.034 in the Blu-ray version of the movie.

Quote context

[...]

- Now you get some of that styrofoam popcorn, spread it all around.

- Don't be stingy. Uncle Burt's paying for this.

- More, Freddy, more. OK, that's fine. Now spread it around.

- That's right. You're doing very nice work.

- Thanks.

- You're gonna be fine in the warehouse business.

- Where do we get all these skeletons from?

- Oh, they come from India.

- India?

- International treaty. All skeletons come from India.

- No kidding. How come?

- How the hell do I know how come?

- The important question is, where do they get all the skeletons with perfect teeth?

- I'm going to ask you a serious question. How many people you know die with a beautiful, perfect set of choppers in their puss, huh?

- Nobody I can think of.

- Yeah.

- No. I think that there's a skeleton farm over in India. Jesus!

- Come on, kid. Follow your uncle here. Here we go.

[...]