- Failed? Do you realize what you tried to do is impossible? Yet you almost did it.
- But I didn't.

4 seconds sound clip from the Robot Monster (1953) movie soundboard.

You can hear this line at 00:29:16.838 in the Blu-ray version of the movie.

Quote context

[...]

- I can't control my hands anymore!

- Let's rest a little.

- Oh, but we can't!

- Roy's right. It's time you get some sleep, Alice.

- Jiminy! Two days you've been at it!

- Oh, not that long, it can't be that long!

- The rocket ship must have taken off at dawn. They are either there by now, or...

- Then I've failed you. I'm sorry, Dad.

- Failed? Do you realize what you tried to do is impossible? Yet you almost did it.

- But I didn't.

- Hu-mans! Yesterday I calculated five of you. Now I find six.

- He still doesn't know about Jason and McCloud.

- There were eight of you.

- The Guidance Ro-Man who understands everything showed me that.

[...]