I've a good mind to give you a thrashing. Didn't we tell you never, never, never to go outside of those wires without our permission?
6 seconds sound clip from the Robot Monster (1953) movie soundboard.
You can hear this line at 00:17:37.145 in the Blu-ray version of the movie.
Quote context
[...]
- Then there are perhaps eight people left on earth?
- Not perhaps. Precisely. Find and destroy them, then report back.
(electric buzzing and crackling)
- Martha, it's all right! He's here!
- Anger won't keep the boy from doing it again. We must tell him why.
- Saw who?
- Ro-Man. He's in the cave at the end of the ravine.
[...]