- Dad, what are you doing in the basement this time of night?
- Working in my shop.

4 seconds sound clip from the Invasion of the Body Snatchers (1956) movie soundboard.

You can hear this line at 00:25:08.023 in the Blu-ray version of the movie.

Quote context

[...]

- I'm dragging you into a dark hallway because I'm scared of the dark tonight.

- In that case I'd better stay and tuck you in.

- That way lies madness.

- What's wrong with madness?

- Madness.

- Now good night.

- Well, it's about time you two got home.

- Dad, what are you doing in the basement this time of night?

- Working in my shop.

- How about a nightcap, doc?

- No, thanks it's kind of late. I'll take a rain check. Good night.

- Good night.

- Good night, Miles.

- Look, Jack, it's you! It's you!

- No, no you mustn't go near it. Get out of here please Please.

[...]