Then at the final moment, the pressure forces the ship from its carrier and speeds it on its way.

7 seconds sound clip from the The Adventures of Superman - The Baby from Krypton classic radio series.

You can hear this line at 00:07:10 in the radio play.

Quote context

[...]

- Can't you come in and look at him? You've scarcely see him these days, what with working all hours on the space ship model.

- It can't be helped dear, I'm racing against time.

- Right now I'm anxious to know whether the model will behave as I hope.

- How does it operate? Very simply. When all is ready, I throw this switch.

- That closes the circuit and electric energy builds up pressure in the atomic generators.

- Then at the final moment, the pressure forces the ship from its carrier and speeds it on its way.

- But where does it go? Wherever its pointed. This one I'm directing to the planet Earth.

- Earth? What is that, Jor-L?

- A planet smaller than our own, situated on the other side of the sun. It's inhabited by a race of people similar to ourselves.

- Like ourselves?

- Oh well... only partly, of course, my dear. They're about the same size, but no where nearly as developed.

- Very weak and helpless and with all their faculties extremely limited.

[...]