Hey, you better not smoke around here. Something might explode.

5 seconds sound clip from the The Loved One (1965) movie soundboard.

You can hear this line at 01:34:57 in the Blu-ray version of the movie.

Quote context

[...]

- I tell you, he can put them in orbit.

- He can what?

- He can put them in orbit.

- He can put them into orbit... He can put them into an orbit of eternal grace.

- Yes, I should like very much to meet this young Gunther.

- Yes, among the hardware which is now totally obsolete, a modified Atlas-8 would be the vehicle of choice, for the purpose you describe.

- Modification? To what extent?

- Hey, you better not smoke around here. Something might explode.

- Of course, the real problem will be in obtaining a missile in the first place.

- Get me General Buck Brinkman in Air Force surplus.

- Come over and meet the reverend.

- No, thank you, son.

[...]